Weapons : proliferation : agreement between the United States of America and Azerbaijan, signed at Baku, January 2, 2004, and Agreements Amending the Agreement, signed at Baku and Washington, September 29 and October 28, 2004; signed at Baku and Washington, August 1 and 26, 2005; signed at Baku and Washington, June 28 and July 11, 2006; signed at Baku and Washington, March 7 and April 24, 2007; signed at Baku and Washington, February 18 and March 5, 2008; signed at Baku and Washington, April 13 and May 8, 2009.