Manila holds 10 Iraqis after sleeper cells found By John O'Callaghan MANILA, March 21 (Reuters) - Philippine officials said on Friday the discovery of Iraqi sleeper cells had led to the arrest of 11 people over possible links to an expelled Iraqi diplomat accused of having ties to Muslim rebels. Philippine security forces are on high alert for attacks in retaliation for the U.S.-led war against Iraq that started on Thursday. The Philippines is seen as a possible target because of its support for the war and because the United States has trained Philippine troops to fight Islamic and communist...