Chief of Staff of the Qatari Armed Forces Maj. Gen. Hamad bin Ali Al-Attiyah met here on Sunday with Undersecretary of U.S. Defence Department for Political Affairs and member of the Armed Services Committee in the U.S. Senate Senator Lindsey Graham, currently visiting Qatar. Talks during the meeting dealt with areas of co-operation between the two countries in military field. The meeting was attended by U.S. Ambassador to Qatar Joseph LeBaron and a number of senior officers of the Qatari Armed Forces, according to a report of Qatar News Agency (QNA).