; and (B) described in section 501(c)(3) of the Internal Revenue Code of 1986 and exempt from taxation under section 501(a) of that Code. (2) District of Columbia and its environs The term District of Columbia and its environs has the meaning given that term in section 8902(a) of title 40, United States Code. (3) Global War on Terrorism The term Global War on Terrorism means any contingency operation conducted by the Armed Forces in response to the terrorist attacks of September 11, 2001, or other terrorist attack. (4) Memorial The term memorial means the National Global War on Terrorism Memorial authorized to be established under section 2.