administration requested more than $100 million for a "massive" upgrade to the embassy compound in 2012. As of 2006, construction was being led by the Kuwaiti firm First Kuwaiti Trading & Contracting. The embassy has extensive housing and infrastructure facilities in addition to the usual diplomatic buildings. The buildings include: Six apartment buildings for employees Water and waste treatment facilities A power station Two "major diplomatic office buildings" Recreation, including a gym, cinema, several tennis courts and an Olympic-size swimming pool The complex is heavily fortified, even by the standards of the Green Zone. The details are largely secret, but it is likely to include a significant US Marine Security Guard detachment. Fortifications include deep security perimeters, buildings reinforced beyond the usual standard, and five highly guarded entrances. On October 5, 2007, the Associated Press reported the initial target completion date of September would not be met, and that it was unlikely any buildings would be occupied until 2008. In May 2008, US diplomats began moving into the embassy. The embassy formally opened over a year behind schedule in January 2009 with a staff of over 16,000 people, mostly contractors, but including 2,000 diplomats. In February 2012, weeks after the final departure of US Military forces from Iraq, the State Department announced that the staff would be greatly reduced because of budget concerns and a re-evaluation of diplomatic strategy in Iraq, in light of the military withdrawal. The Office of Security Cooperation - Iraq, part of the larger Embassy after the 2011 U.S. withdrawal held the remaining Department of Defense support personnel, totalling about 1,000 contractors and about 147 DOD uniformed personnel. It operated from ten locations around Iraq, and managed about 370 Foreign Military Sales cases, totaling more than US$9 billion of pending arms sales, citing a February 2012 Congressional Research Service report. The biggest program underway was the much-delayed sale of 18 Lockheed Martin F-16 Fighting Falcon fighters. On May 15, 2019, the United States Department of State ordered all non-emergency, non-essential government employees at the Embassy and Erbil consulate office to leave Iraq amid heightened tensions in the Persian Gulf between the United States and Iran. On December 31, 2019, thousands of demonstrators attacked the embassy and breached the outside walls in response to an airstrike that killed 25 on December 27. President Donald Trump blamed Iran for the embassy attack and deployed 750 troops to Baghdad.