US military spaceplane atop SpaceX Falcon Heavy launch delayed to Monday

The US military's secretive

X-37B spaceplane

which was poised for launch on Sunday on the robot craft's

seventh mission

to

orbit

atop a

SpaceX Falcon Heavy

rocket has been delayed to

Monday

, SpaceX said on Sunday.
"SpaceX is targeting Monday, December 11 at 8:14 p.m. ET for Falcon Heavy's launch of the USSF-52 mission to orbit from NASA's Kennedy Space Center in Florida," the rocket manufacturing company said in a statement.