An early bird rocket launch from the Florida spaceport will take to the skies before dawn Thursday when an Atlas 5 lofts a classified U.S. government satellite.

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).

Boeing said Tuesday the first orbital test flight of its commercial crew capsule, named the Starliner, will be delayed until August “in order to avoid unnecessary schedule pressure” and give priority on the Atlas 5 rocket’s manifest to a U.S. Air Force communications satellite. NASA confirmed Wednesday that officials have approved an extension of the Starliner’s first crewed mission to last up to several months.