Plot: 2011/04/21 Headlines: Obama Administration Announces $25 Million in Aid to Libyan Rebels; United Nations Urges Caution in Libya Mission; Libya Mortar Attacks Kill 10 Civilians, Including 2 Photojournalists; Bahrain Begins Secret Military Trial Against Human Rights Activist; Iraqi Cleric Denounces Ban on Public Gatherings as "Un-Democratic"; Egypt to Remove Mubarak Name from Public Places; U. N