CAPE CANAVERAL, Fla. (AP) -- A pair of astronauts took a spacewalk Thursday to install a new antenna and move a cargo boom outside the International Space Station.

Russians Alexander Skvortsov and Oleg Artemiev had to haul the antenna out with them. It was such hard work getting it out that they had to take a break as the spacewalk got underway 260 miles up. They took another rest less than an hour later.

Russian space station crew member Oleg Artemiev floats outside the International Space Station during a space walk by two Russians, Thursday, June 16, 2014, to install a new antenna and move a cargo boom. (AP Photo/NASA-TV)

It was the first spacewalk for the two men. Russia's Mission Control outside Moscow directed all the action.

"Don't be in a hurry. Don't try to catch up," someone urged.

"We don't have to push it," one of the spacewalkers said.

Among the several tasks: switching out some science experiments.

Six men live on the space station. The crew includes three Russians, two Americans and one German. The Americans are supposed to venture out on NASA-led spacewalks in August. Skvortsov and Artemiev also have another spacewalk scheduled for August.