A president cannot unilaterally order military strikes, unless there is a immediate direct threat on our nation, or unless Congress votes to approve the attack. Obama himself in 2007 stated that the president cannot unilaterally start a war.
It matters little what Obama says in speeches or conversations. He has lost all credibility. The final blow is Bill Ayers current claim that he wrote the book "Dreams From My Father". This after Obama's election campaign where he claimed it was a labor of love.
source: http://biggovernment.com/tmcclintock/2011/04/01/the-attack-on-libya-crossed-a-very-bright-constitutional-line/#more-249632