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we've grown used to wonders in this

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century it's hard to dazzle us but for

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25 years the United States space program

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has been doing just that

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the Challenger crew was pulling us into

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it's a simulation six selected to help

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this country their shuttle is called

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discovery like other orbiters it's named

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after scientific exploring ships of

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hundreds of improvements have been made

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in the entire space shuttle system

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modifications have been made in the

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design of the segments meted together

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prior to launch connections between the

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segments are called joints redesigned to

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prevent hot gases from burning through

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the new joints have undergone numerous

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tests at NASA's Marshall Space Flight

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test preparations were extensive

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inspections

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some of the firings defects were created

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both in the Rockets insulation and

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critical wings to ensure that backup

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systems work properly the o-rings are

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as shown in this cross-section the new

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feel joint has an additional oring

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improved insulation and a metal lip

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called the capture feature are also

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included to better combat liftoff

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NASA engineers

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commander and his crew

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a team of two others

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through training regimens at the Johnson

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Space Center are demanding mission

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specialists pinky Nelson and Mike lounge

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practice space walking procedures in

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de Villiers a third mission specialist

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in between numerous exercises with their

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the crews main tasks will be to put in a

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space a large tracking and data relay

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satellite called Tetris seen by the STS

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six astronauts reduce vacation blackouts

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between shuttles in the ground once

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titre sea is in place earth to space

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contact will be almost continuous they

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will also manage eleven in-cabin

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experiments some commercial and -

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designed by students before landing and

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trifling with five days later the

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prestige and leadership under

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administrative forms so hard over these

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30 years or two gainst lines of

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communication just reference to our

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space sensibilities clearly agency

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flight another astronaut Brian O'Connor

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was chairman of a Space Flight Safety

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I believe that's the way things should

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be run you should have somebody in

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charge and delegated as a point of

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responsibility new safety hardware

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introduced with Discovery's flight will

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allow astronauts to parachute from the

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shuttle in some emergencies the

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equipment consists of a pole that can be

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extended out the orbiters main hatch

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astronauts attach themselves to the pole

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and slide down once clear

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along with the quick escape system are

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the crews new pressure seats containing

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the parachute life support hardware and

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a life raft hear they practice drills

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with additional safety equipment an

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inflatable slide similar to the type

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carried aboard commercial jet life if an

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emergency develops on landing the slide

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allows the crew to get out quickly there

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are more fire detectors and protective

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barriers at the launch pads plus

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corporations astronauts and pad

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personnel and tougher to achieve and

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ride to the ground with an option to use

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a new safety bunker once there as a

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result of tire wear problems during

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shuttle landings at Kennedy Space Center

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researchers at NASA Langley studied tire

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and runway characteristics once the tire

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Johnna track it speeds up to 250 miles

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slow motion photography an

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Kennedy is one of three Leonard's a

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country's strategic to any shuttle

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flight after extensive testing engineers

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recommended that the surface be notified

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the final quarter or texture is etched

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lengthwise into sections at each end of

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the runway modifications and the

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shuttles brakes landing burek animals

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while technicians work on Discovery's

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payload Bay thousands of heat-resistant

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tiles are inspected on the other side of

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the solid rocket boosters and large

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while space shuttle Discovery is readied

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for launch a new orbiter moves through

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various stages of construction at

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Rockwell International in California

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having a four shuttle fleet is necessary

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because it takes two to four months

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after a mission to prepare an orbiter to

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for maintaining the efficiency of this

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turnaround process NASA is adding a

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in the future the mixed fleet of launch

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vehicles will be used rather than

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relying on a single transportation

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t-minus 15 14 successful men enjoy our

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make Marshall are safely reliable as

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possible they were his mere inspiration

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we are confident we will launch and come

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back safely but they're no guarantees

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associated with that and there can't be

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only way you can guarantee that much

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the shuttle is an agency in Space

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Station efforts in materials processing

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in microgravity research and led to the

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creation of metal alloys and refinement

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of new drugs the upcoming mission renews

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the commitment to these achievements and

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as a reminder of what makes them

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possible it is people it is everybody

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from the secretary the person that

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sweeps the floor to the engineer the

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technician to the management to the

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administrator it is people and it is

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important that everybody out there

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understand that if the hardware is

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important but it is people that make