The U.S. and its NATO allies appeared Monday to be considering sending armed forces to intervene in Libya as fighting escalated between Col. Muammar Gaddafi and rebels. Europe scrambled Monday to press for an international no-fly zone for the region, a signal of possible military intervention. It’s still unlikely the U.S. will deploy warplanes or missiles, but President Obama authorized $15 million in new humanitarian aid to assist refugees. He warned that the money should "send a clear message" to Gaddafi and his allies. NATO agreed Monday to increase surveillance flights over Libya from 10 to 24 hours a day, to help give the alliance a better picture what is happening on the ground.