Video: Liftoff of Atlas 5 with X-37B on program’s fourth flight

Watch the pre-launch news conference held Thursday at NASA’s Kennedy Space Center to preview liftoff of the agency’s TDRS-M data relay satellite aboard a United Launch Alliance Atlas 5 rocket from Cape Canaveral.

The addition of a U.S. Air Force communications satellite has capped the assembly of a 218-foot-tall United Launch Alliance Delta 4 rocket at Cape Canaveral set for liftoff the evening of March 13.

The next launch of United Launch Alliance’s Atlas 5 rocket with the U.S. Air Force’s fifth Advanced Extremely High Frequency communications satellite, previously scheduled for Thursday, has been delayed to no earlier than July 12 to replace a failed battery on the vehicle.