Obama starts UK visit, security issues paramount

LONDON - US President Barack Obama on Tuesday begins a visit to Britain where he and Prime Minister David Cameron will review NATO action to help end conflict in Libya and Western policy towards uprisings in the Arab world.
He and Cameron will also launch a joint US-British group to tackle national security challenges together.
As a precautionary measure Obama flew to London on Monday night instead of Tuesday morning because of fears that a volcanic ash cloud from Icelandic could drift over Ireland and prevent his Air Force One jet from flying.