WASHINGTON, May 12 (UPI) -- The tragedy at Camp Liberty, near Baghdad, where an American soldier shot and killed five U.S. personnel and wounded three others, has been at least six years in the making.

WASHINGTON, March 1 (UPI) -- U.S. officials think Iran has sufficient material to produce a nuclear weapon, Joint Chiefs of Staff Chairman Mike Mullen said Sunday.

HELSINKI, Finland, Oct. 21 (UPI) -- Admiral Mike Mullen, chairman of the U.S. Joint Chiefs of Staff, and Gen. Nicolai Makarov, head of the Russian General Staff, met Tuesday in Finland.

WASHINGTON, Sept. 3 (UPI) -- U.S. Joint Chiefs of Staff Chairman Mike Mullen says he thinks Washington and Iraq can agree on the future role of American forces in Iraq by year's end.

WASHINGTON, July 22 (UPI) -- U.S. Defense Secretary Robert Gates says he wants details on the military's use of private contracting firms such as Blackwater for training.

WASHINGTON, July 20 (UPI) -- The chairman of the U.S. Joint Chiefs of Staff said Sunday an Iraq withdrawal timeline could have dangerous consequences.

WASHINGTON, July 17 (UPI) -- The United States may consider raising troop strength in Afghanistan even as it considers cuts in Iraq, top defense officials indicated.

WASHINGTON, July 7 (UPI) -- The U.S. Navy last week carried out an exercise to check out the communications network of its Aegis anti-ballistic missile warships throughout the Middle East region, the Navy Times reported Friday.

WASHINGTON, July 2 (UPI) -- Diplomacy is the preferred option to diffuse Israeli-Iranian tensions over Iran's nuclear program, Adm. Mike Mullen, U.S. Joint Chiefs of Staff chairman, said.