T+00:00	Launch
The twin Solid Rocket Motor Upgrade (SRMU) boosters are ignited and the Titan 4B rocket liftsoff .36-of-a-second later from Space Launch Complex-4 East at Vandenberg Air Force Base, California.
T+02:13.1	Stage 1 Ignition
The Titan 4B rocket's core vehicle stage 1 engine -- the Aerojet LR87-AJ-11 -- is ignited. The liquid-propellant powerplant burns Aerozine-50 fuel and nitrogen tetroxide oxidizer.
T+02:27.9	SRMU Separation
Having consumed all their solid-propellant, the two Alliant Techsystems-built solid rocket boosters are jettisoned to fall into the Pacific Ocean.
T+03:20.7	Jettison Payload Fairing
The 66-foot long payload fairing built by Boeing that protected the classified satellite cargo during launch is separated once heating levels drop to predetermined limits.
T+05:19.8	Staging of Titan Core
The first stage engine shuts down and the second stage Aerojet LR91-AJ-11 engine is ignited. The spent first stage is jettisoned from the rest of the space-bound Titan 4B rocket one second after the second stage is started.
T+08:56.6	Stage 2 Shutdown
The liquid-fueled second stage engine completes its firing and the rocket enters a brief coast period before deployment of the payload.
T+09:16.6	Spacecraft Separation
The secret payload for the U.S. National Reconnaissance Office is released into space from the Titan 4B rocket's second stage completing the B-28 launch.

Data source: U.S. Air Force.