The United States will remain vigil and continue to put pressure on Al-Qaida and its affiliated members worldwide, in North Africa and the Middle East, US President Barack Obama told CBS\'s 60 Minutes in an interview to be aired on Sunday. The comments followed the attack against the US embassy in Benghasi, Libya, in which the ambassador and another three Americans died. The Pentagon is moving two Navy ships towards the Libyan coast while US diplomatic personnel will be transferred. The two war ships don\'t have a specific mission, according to US media reports, but are ready to be deployed for any mission the president might order. The ships USS Laboon and USS McFaul are provided with Tomahawk missiles.