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"HOUSTON, STATION
ON SPACE TO GROUND."

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WELCOME TO SPACE TO GROUND,
I'M KATHRYN MCLAURIN.

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A SUCCESSFUL SPACEWALK IS
JUST ONE OF THE HIGHLIGHTS

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OF AN ANOTHER EXCITING
WEEK ON STATION.

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EXPEDITION 55 FLIGHT
ENGINEERS DREW FEUSTEL

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AND RICKY ARNOLD COMPLETED
THE 210TH SPACEWALK IN SUPPORT

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OF STATION ASSEMBLY,
MAINTENANCE AND UPGRADES.

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THE SIX HOUR AND 31 MINUTE
SPACEWALK WAS THE EIGHTH

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FOR FEUSTEL AND THE
FOURTH FOR ARNOLD.

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THEY COMPLETED ALL OF THEIR
PRIMARY OBJECTIVES INCLUDING

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RELOCATING A PUMP FLOW
CONTROL SUBASSEMBLY, OR PFCS,

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FROM A SPARE PARTS PLATFORM
ON THE STATION'S TRUSS

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TO THE SPECIAL PURPOSE
DEXTEROUS MANIPULATOR,

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OR DEXTRE, ROBOTIC ARM.

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THE PFCS DRIVES AND
CONTROLS THE FLOW OF AMMONIA

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THROUGH THE EXTERIOR PORTIONS
OF THE STATION'S COOLING SYSTEM.

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THE ASTRONAUTS ALSO
REPLACED A CAMERA SYSTEM

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ON THE DESTINY LABORATORY AND
A COMMUNICATIONS RECEIVER.

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THE SECOND SPACEWALK FOR THIS
TEAM IS PLANNED FOR MID JUNE.

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EXPEDITION CREWMEMBERS ALSO HAD
THE OPPORTUNITY TO TAKE IMAGES

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OF A MAJOR EVENT BACK ON EARTH.

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WHILE FLYING OVER THE BIG
ISLAND OF HAWAII, ASTRONAUTS

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AND COSMONAUTS SHOT
PHOTOGRAPHS OF THE ASH PLUME

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FROM THE KILAUEA VOLCANO.

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THE VOLCANO BECAME
ACTIVE EARLIER THIS MONTH,

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WITH NUMEROUS FISSURES EMITTING
LAVA AND TOXIC SULFUR DIOXIDE.

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NASA SUPPORTS THE
INTERNATIONAL DISASTER CHARTER,

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WHICH GATHERS IMAGERY AND
DATA FOR NATURAL DISASTERS

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AROUND THE GLOBE TO SHARE
WITH EMERGENCY RESPONDERS.

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YOU CAN SEE SOME OF
THE STUNNING IMAGES

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ON THE CREWMEMBERS
SOCIAL MEDIA ACCOUNTS.

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THIS WEEK'S TWITTER
QUESTION COMES FROM SHANKAR.

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HE WANTS TO KNOW HOW IS
THE STATION REBOOSTED

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AND HOW DOES IT GET REFUELED.

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THE STATION CAN BE
REBOOSTED TWO DIFFERENT WAYS:

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USING THRUSTERS LOCATED THE
RUSSIAN ZVEZDA SERVICE MODULE

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OR FIRING THE ENGINES
ON A DOCKED PROGRESS.

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PROGRESS IS THE PRIMARY METHOD,

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ZVEZDA IS USUALLY
USED AS A BACKUP.

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PROGRESS CRAFT ALSO
DELIVER FUEL TO THE STATION,

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WITH THE FUEL STORED IN
TANKS ON ZVEZDA AND ZARYA.