2 NASA astronauts set for spacewalk to replace faulty space station antenna

TV will cover live as sstronauts Thomas Marshburn and Kayla Brown exit an airlock of the orbiting research lab some 402 km above Earth.

Two U.S. astronauts were set on Tuesday to venture out of the International Space Station for a spacewalk to replace a failed antenna, facing what NASA officials say is a slightly elevated risk from the debris of a Russian anti-satellite missile test.

NASA TV planned to provide live coverage of the 6-1/2-hour spacewalk, scheduled to begin at 7:10 a.m. Eastern time (1210 GMT) as astronauts Thomas Marshburn and Kayla Brown exit an airlock of the orbiting research lab some 250 miles (402 km) above Earth.

The outing is the fifth spacewalk for Marshburn, 61, a medical doctor and former flight surgeon with