serbia tried to hold on to kosovo. both sides committed atrocities. but when the serbs began ethnically cleansing the albanian population from parts of kosovo, nato intervened. we must not allow ethnic cleansing or genocide, particularly at the edge of europe. air raid sirens blare news archive: on the ground, air raid sirens _ gave the first warning of the attacks. the streets emptied as many took shelter. then came the first explosions. in 1999, nato launched an ii—week bombing campaign against serb forces in kosovo and on key targets across serbia. the air strikes eventually brought an end to bloodshed. the serbs preserved some of the ruins of nato�*s attack — a permanent reminder of the lives lost