Spacewalk underway to rearrange ‘Frosty’ and ‘Leaky’ ammonia pumps

CAPE CANAVERAL, Fla. — The Associated Press - NASA astronauts Drew Feustel (FOY-stull) and Ricky Arnold emerged from the International Space Station on Wednesday to rearrange the space station's external cooling system by swapping the positions of two spare ammonia pumps.

NASA wants the best spare in the best spot. One pump got too cold because of a power shutdown 17 years ago and is called Frosty. The other spewed out ammonia five years ago and is dubbed Leaky.