德尔塔4重型火箭将于6月9日周四发射，将美军新一代大型军用间谍卫星送入太空

Launch period: 1730-2230 GMT (1:30-6:30 p.m. EDT)
Launch site: SLC-37B, Cape Canaveral Air Force Station, Florida

A United Launch Alliance Delta 4-Heavy rocket will launch a classified spy satellite cargo for the U.S. National Reconnaissance Office. The largest of the Delta 4 family, the Heavy version features three Common Booster Cores mounted together to form a triple-body rocket. Delayed from April 27, May 12, June 3 and June 4. [June 2]