T-00:05.5	Engine start
	The Rocketdyne RS-68 main engine begins to ignite as the liquid hydrogen fuel valve is opened, creating a large fireball at the base of the rocket. The engine powers up to full thrust for a computer-controlled checkout before liftoff.
T-00:00.0	Liftoff
	The hold-down bolts are released and the third flight of Delta 4 is underway from Cape Canaveral's pad 37B. The three umbilical swing arms extending from the launch pad tower retract from the rocket at T-0 seconds.
T+01:30.6	Max-Q
	The vehicle experiences the region of maximum dynamic pressure. The RS-68 liquid hydrogen/liquid oxygen engine continues to fire as the vehicle heads downrange, arcing over the Atlantic.
T+03:36.8	Begin engine throttling
	With engine shutdown coming up and the axial acceleration of 4.5 g's is reached, the RS-68 powerplant starts throttling down from 102 percent. It will achieve a 57 percent throttle at T+3 minutes, 41.8 seconds.
T+04:19.9	Main engine cutoff
	The first large all-American rocket engine developed in a quarter-century completes its third launch as the RS-68 shuts down.
T+04:30.9	Stage separation
	The Common Booster Core first stage and the attached interstage are separated in one piece from the Delta 4's upper stage. The upper stage engine's extendible nozzle drops into position as the first stage separates.
T+04:44.4	Second stage ignition
	The upper stage begins its job to place the DSCS B6 spacecraft into space with the first of two firings. The stage and its Pratt & Whitney RL10B-2 liquid hydrogen/liquid oxygen engine is basically identical to the Delta 3 upper stage flown previously.
T+04:54.5	Jettison payload fairing
	The four-meter diameter composite payload fairing that protected the DSCS cargo atop the Delta 4 during the atmospheric ascent is no longer needed, allowing it to be jettisoned in two halves.
T+14:13.4	Upper stage shutdown
	The RL10 upper stage engine shuts down to complete its first firing of the launch. The rocket and attached satellite reach a parking orbit of 100.0 by 216.7 nautical miles with an inclination of 29.20 degrees.
T+26:03.0	Restart upper stage
	After a 12-minute coast period, the upper stage is reignited to finish the task of boosting DSCS into the intended orbit.
T+30:11.2	Upper stage shutdown
	The powered phase of the Delta 4's mission to loft DSCS concludes. The targeted geosynchronous transfer orbit is 125.8 by 19,323.5 nautical miles with an inclination of 25.50 degrees.
T+30:41.2	Maneuver to deploy attitude
	The upper stage uses its thrusters to maneuver into the proper orientation for release of DSCS. This attitude maneuver will last until T+32 minutes, 1.2 seconds.
T+37:51.2	Begin spin-up
	The next step in preparing for deployment of the payload is spinning up the stage like a top to 4.6 rpm.
T+42:01.7	Spacecraft separate
	The Air Force's Defense Satellite Communications System B6 spacecraft is released into space from the Delta 4 rocket, completing the U.S. military's second Evolved Expendable Launch Vehicle mission.