The White House, Office of the Press Secretary. May 1, 2012.

In May 2010, in Washington, DC, President Obama and President Karzai committed the United States and Afghanistan to negotiate and conclude a strategic partnership that would provide a framework for our future relationship.  On May 1, 2012, President Obama and President Karzai signed the Enduring Strategic Partnership Agreement between the Islamic Republic of Afghanistan and the United States of America.

http://www.whitehouse.gov/sites/default/files/2012.06.01u.s.-afghanistanspasignedtext.pdf [PDF format, 9 pages].

The White House, Office of the Press Secretary. Bagram Air Base, Afghanistan. May 1, 2012.

In a televised address, President Obama discusses progress made by U.S. troops and the new relationship between the United States and Afghanistan.

http://www.whitehouse.gov/the-press-office/2012/05/01/remarks-president-obama-address-nation-afghanistan [HTML format].

The White House, Office of the Press Secretary. Presidential Palace, Kabul, Afghanistan. May 1, 2012.

PRESIDENT OBAMA:  “President Karzai, the leaders of the Afghan government and society who are here, and most of all, to the Afghan people, thank you so much for welcoming me here today, especially in these beautiful surroundings.  
I, too, want to thank Ambassador Ryan Crocker and National Security Advisor Spanta and their teams for the extraordinary work that brought about this day.  
I’ve come to Afghanistan to mark a historic moment for our two nations, and to do so on Afghan soil.  I’m here to affirm the bonds between our countries, to thank American and Afghans who have sacrificed so much over these last 10 years, and to look forward to a future of peace and security and greater prosperity for our nations…”

http://www.whitehouse.gov/the-press-office/2012/05/01/remarks-president-obama-and-president-hamid-karzai-afghanistan-signing-s [HTML format].