LP-0B became operational in 1999,and was subsequently upgraded in 2003 with the construction of a mobile service tower, which was completed in 2004. It is active, and is currently used by Northrop Grumman Minotaur rockets. The first launch from LP-0B was of a Minotaur I in December 2006, and was the first launch from the Mid-Atlantic Regional Spaceport.