Context of Hearing on National Defense Authorization Act for Fiscal Year 2012 and oversight of previously authorized programs before the Committee on Armed Services, House of Representatives, One Hundred Twelfth Congress, first session : Subcommittee on Emerging Threats and Capabilities hearing on counterproliferation strategy and the fiscal year 2012 national defense authorization budget request for the Defense Threat Reduction Agency and Chemical Biological Defense Program, hearing held March 11, 2011