Two days after blasting off from Virginia’s Eastern Shore, Orbital ATK’s Cygnus supply ship reached its destination Tuesday. The automated spacecraft packed with 3.7 tons of supplies and experiments was captured by the International Space Station’s robotic arm at 5:04 a.m. EST (1004 GMT).

Two astronauts ventured outside the International Space Station early Thursday and performed what amounted to hand transplant surgery on the lab’s Canadian-built robot arm, removing a crippled grapple fixture on one end of the space crane and replacing it with an on-board spare.

Veteran cosmonaut Fyodor Yurchikhin and rookie flight engineer Jack Fischer streaked into orbit aboard a Russian Soyuz ferry craft Thursday, chased down the International Space Station and glided to a smooth docking to complete a six-hour rendezvous.