Here's a look at what you need to know about POW/MIA's in Iraq and Afghanistan from 1991 to the present.
Scott Speicher: January 17, 1991 - During the first night of Operation Desert Storm, Navy pilot Lt. Cmdr. Michael Scott Speicher is shot down over Iraq.
May 22, 1991 - His status is changed from MIA (missing in action) to KIA (killed in action).
January 11, 2001 - His status is changed from KIA back to MIA.
October 11, 2002 - Speicher's status is changed again, from MIA to missing-captured.
March 10, 2009 - His status is changed from missing-captured to MIA.
July 2009 - A crash site is investigated by U.S. Marines after a tip from an Iraqi civilian.
August 2, 2009 - The U.S. Dept. of Defense announces that remains found at the crash site have been positively identified as Speicher's.
507th Maintenance Co. and Apache Helicopter Pilots: March 23, 2003 - Members of the Army's 507th Maintenance Co. become separated from a 600 hundred vehicle convoy traveling from Camp Virginia, Kuwait to Baghdad, Iraq. After mistakenly driving into Nasiriya, the group is ambushed. Nine soldiers are killed in the battle and eight are captured.
Two soldiers die after being captured. - Pfc. Lori Piestewa - first female killed in the Iraq War. - Sgt. Donald Ralph Walters
Five are captured alive and kept together as a group. At some point, they are moved from Nasiriya to Samarra. - Army Specialist Joseph Hudson - Pfc. Patrick Miller - Army Specialist Shoshana Johnson - Specialist Edgar Hernandez - Sgt. James Riley
One seriously injured soldier, Pfc. Jessica Lynch, is taken captive and separated from the other POWs. She is kept by Iraqi forces for a period of time and then taken to an Iraqi hospital.
March 24, 2003 - An Apache Longbow helicopter crashes in Karbala, Iraq. The pilots, Chief Warrant Officer David Williams and Chief Warrant Officer Ronald Young, Jr., try to evade capture but are taken prisoner by Iraqi forces. The pilots are taken to Samarra and eventually join the other POWs from the 507th Maintenance Co.
April 1, 2003 - After receiving a tip from an Iraqi, U.S. forces storm the hospital in Nasiriya and rescue Pfc. Lynch.
April 13, 2003 - U.S. forces arrive in Samarra on their way to a battle in Tikrit. An Iraqi asks them if they've come for the Americans and then leads them to the seven POWs.
2004 - The Army concludes that Walters was captured, taken to another location and shot. His status is then changed from KIA to POW-Murdered.
Keith M. Maupin: April 9, 2004 - Army Reservist Spc. Keith Matthew Maupin is captured by insurgents after his convoy comes under attack near Baghdad International Airport in Iraq.
April 12, 2004 - The military classifies him as "duty status whereabouts unknown" (DUSTWUN).
April 16, 2004 - Al Jazeera broadcasts a videotape of Maupin made after his capture. The US Army declares him missing-captured.
June 28, 2004 - A videotape allegedly showing Maupin's execution is broadcast by Al-Jazeera. The U.S. Army states that it is impossible to identify the person on the tape as Maupin.
March 30, 2008 - Maupin's family announces that his remains have been found in Iraq, and positively identified by DNA testing.
Kristian Menchaca and Thomas Tucker: June 16, 2006 - Insurgents attack a check point in Yusufiya and capture two soldiers, Pfc. Kristian Menchaca and Pfc. Thomas L. Tucker.
June 19, 2006 - U.S. forces locate the bodies of Menchaca and Tucker. The bodies show signs of severe torture and mutilation.
Ahmed K. Altaie: October 23, 2006 - Spc. Ahmed K. Altaie disappears in Iraq. It is initially unclear whether he has been kidnapped or left intentionally.
December 11, 2006 - The DOD changes his status from "duty status whereabouts unknown" to missing-captured.