DAMASCUS, Syria (AP) — Syria threatened Wednesday to cut off security cooperation along the Iraqi border if there are more American raids on Syrian territory, and the U.S. Embassy announced it would close Thursday because of a mass rally called to protest a deadly weekend commando attack. Thousands were expected to participate in the government-sanctioned protest. Though authorities usually keep Syria under tight control and Americans have generally been welcomed, violence against U.S. and European interests at protests has erupted in the past.—-Contact The Daily Reveille’s news staff at [email protected]