Context of James Zadroga 9/11 Health and Compensation Act of 2009 : joint hearing before the Subcommittee on Immigration, Citizenship, Refugees, Border Security, and International Law and the Subcommittee on the Constitution, Civil Rights, and Civil Liberties of the Committee on the Judiciary, House of Representatives, One Hundred Eleventh Congress, first session, on H.R. 847, March 31, 2009