U.S. President Barack Obama said he was reluctant to use force on Libya but believes it is necessary to save the lives of civilians. Speaking in Brazil, he told reporters: "We cannot stand idly by when a tyrant tells his people there will be no mercy." America is trying to keep a lower profile in the military action against Libya. It does not want the world to think it is attacking another Arab country. This may not be the case with world opinion this time round. The coalition includes Arab states who have promised material support for strikes against Libya. Foreign ministers of the UAE, Qatar, Iraq, Jordan and Morocco were at the summit. It is possible some of these countries may even take part in air strikes on Libyan military targets.