The U.S. military said on Sunday it has carried out an operation in Haiti to airlift non-essential embassy personnel from the country and added U.S. forces bolster embassy security, as Caribbean nation reels under a state of emergency. The operation was the latest sign of Haiti's troubles as gang violence threatens to bring down the government and has led thousands to flee their homes. "This airlift of personnel into and out of the embassy is consistent with our standard practice for embassy security augmentation worldwide, and no Haitians were on board the military aircraft," the U.S. military's Southern Command said in a statement.