Myanmar has called on its military to "launch operations" against ethnic Rakhine rebels behind a deadly attack on four police stations last week, a government spokesman said Monday, as a surge of violence forces thousands more from their homes.The country's troubled western Rakhine state has seen a series of clashes in recent weeks between security forces and the Arakan Army (AA), an armed group calling for more autonomy for the state's ethnic Rakhine Buddhist population.T