CAPE CANAVERAL, Fla. (Reuters) - A Titan 4 rocket is set to launch a missile-warning satellite Friday in its first mission since an August 1998 billion-dollar failure, the U.S. Air Force said.

The Titan 4B, the most powerful unmanned U.S. rocket, was scheduled to lift off from Cape Canaveral Air Station on Florida's east coast at 11:33 a.m. EDT.....

The rocket will carry into orbit a $400 million Defense Support Program missile-warning satellite, built by TRW Inc. (NYSE:TRW - news)

It will join a constellation of satellites already in orbit that can detect ballistic missile launches and nuclear detonations worldwide.