The Air Force says there's a 90 percent chance of excellent weather conditions for this morning's launch of a rocket on a Space Station resupply mission.
Liftoff is scheduled for 10:36 a.m., after a number of delays this week.
SpaceX says this is the first time it is flying both a rocket and a cargo capsule that have flown in the previous missions.
Minutes after the launch from Cape Canaveral, SpaceX will attempt to land the booster at the cape.
Sonic boom warnings have been issued for counties surrounding the cape.