With Yemen's Presidential Palace under control of Shiite rebels:
Pentagon in position to evacuate U.S. Embassy in Yemen - CNN.com
So far, there has been no decision to evacuate the embassy. The USS Iwo Jima and the USS Fort McHenry were moved "because they will be in the best position if asked," by the State Department to evacuate the embassy, a U.S. official with direct knowledge of the planning tells CNN. So far there has been decision to evacuate the embassy, and no request from the State Department for military assistance.
Pentagon in position to evacuate U.S. Embassy in Yemen - CNN.com