Omar Khadr, at age 15, in the summer of 2002, learning to build land mines in Afghanistan, in a photo used as an exhibit by a war court prosecutor at the U.S. Navy base at Guantanamo Bay, Cuba. The prosecution asked a jury to sentence Khadr, now 24, to 25 years. The jury instead gave him 40. SOURCE: OFFICE OF MILITARY COMMISSIONS

On Sunday Oct. 31, 2010, following a sentencing hearing, the Pentagon released this painting, done by convicted war criminal Omar Khadr, during his time as a detainee at the U.S. Navy base, Guantanamo Bay, Cuba, SOURCE: OFFICE OF MILITARY COMMISSIONS

In this photo of a sketch by courtroom artist Janet Hamlin, and reviewed by the U.S. Department of Defense, Tabitha Speer, widow of special forces Army medic Sgt. 1st Class Christopher Speer, testifies as Canadian Omar Khadr looks on during the fourth day of Khadr's sentencng trial at Camp Justice on Guantanamo Bay U.S. Naval Base in Cuba, Thursday Oct. 28, 2010. JANET HAMLIN / POOL

Omar Khadr, center, is comforted on the morning of the second day of his trial after pleading guilty to war crimes. Comforting him are Canadian lawyer Dennis Edney and Military lawyer Lt. Col. Jon Jackson, right, on Oct. 26, 2010 at the U.S. Navy Base, Guantanamo Bay, Cuba. JANET HAMLIN / POOL SKETCH ARTIST

This is the view of Omar Khadr's war court seat, at left, at the defense table, from the front row of the spectator's gallery, usually reserved for members of the military, at the Camp Justice, the U.S. Navy base, Guantanamo Bay, Cuba, in this handout photo distributed by the Pentagon on Sept. 23, 2010. Also seen at top left is the front row of the jury or commission's box, the witness stand, center, in front of hte flat-screen monitor, the judge's bench, top right and the stand where attorneys argue their case. Not visible is the prosecution table at right, and media gallery off screen at right whose view of the witness stand is blocked by the column seen at the right of the screen. Tech. Sgt. Michael R. Holzworth / US AIR FORCE

Army Col. Patrick Parrish, a military judge, is presiding the military commission of Canadian captive Omar Khadr at Guantanamo. He is shown in this May 10, 2004 file picture, walking out of the Judge Advocate General's office at Fort Bragg, N.C. DAVID SMITH / ASSOCIATED PRESS

Omar Khadr's Canadian lawyer, Dennis Edney, briefs reporters at Camp Justice at the U.S. Navy base at Guantanamo Bay, Cuba on Aug. 12, 2010. CAROL ROSENBERG / MIAMI HERALD STAFF

Army Lt. Col. Jon Jackson, shown here briefing journalists Aug. 8, 2010 outside the media center at the U.S. Navy base at Guantanamo Bay, Cuba, is Canadian Omar Khadr's Pentagon appointed defense lawyer. MIAMI HERALD / CAROL ROSENBERG

Omar Khadr at his war court hearing, Wednesday April 28, 2010, in this court sketch reviewed by a court security officer. JANET HAMLIN / POOL SKETCH ARTIST

In this photo of a sketch by courtroom artist Janet Hamlin, reviewed by a war court security officer, Canadian captive Omar Khadr, left, attends a hearing with his defense team, at Camp Justice at the U.S. Navy Base in Guantanamo, Cuba, on April 28, 2010. JANET HAMLIN / POOL SKETCH ARTIST

In this courtroom drawing by artist Janet Hamlin, reviewed by the U.S. military, Canadian-born accused terrorist Omar Khadr doodling as his lead defense counsel, Navy Lt. Cmdr. William Kuebler, addresses the judge, Army Colonel Patrick Parrish, during a pre-trial session in Camp Justice on the U.S. Navyl Base in Guantánamo Bay, Cuba, Friday, Dec. 12, 2008. Khadr faces charges of murdering a US soldier in a 2002 firefight in Afghanistan. JANET HAMLIN / ASSOCIATED PRESS

In this sketch, approved for release by the U.S. military, Canadian defendant Omar Khadr, far left, sits with his defense team during a hearing at the U.S. Military Commissions at the U.S. Navy Base in southeast Cuba. JANET HAMLIN / POOL SKETCH ARTIST

In this courtroom drawing by artist Janet Hamlin, reviewed by the U.S. military, Canadian-born accused terrorist Omar Khadr attends a pre-trial session in Camp Justice on the U.S. Navy Base in Guantánamo Bay, Cuba, Friday, Dec. 12, 2008. Khadr faces charges of murdering a U.S. soldier in a 2002 firefight in Afghanistan. JANET HAMLIN / POOL SKETCH ARTIST

In this courtroom sketch, Omar Khadr attends his war-crimes trial in Guantánamo Bay, Cuba Thursday, May 8, 2008. JANET HAMLIN / COURTESY CBC

An Army officer walks through the Expeditionary Legal Compound, built at a cost of $12 million, with the old war court building, still in use, behind the green tarp and razor wire. The compound is broadly called Camp Justice because that is where the Pentagon stages its war-on-terror trials Military Commissions. CAROL ROSENBERG / MIAMI HERALD

The former airport control tower at Guantánamo Bay U.S. Navy Base where the military commissions take place is pictured June 19, 2007. PETER TOBIA / PHILADELPHIA INQUIRER

Army Col. Lawrence J. Morris, chief prosecutor for military commission war crimes trials, briefing reporters on July 17, 2008 at the U.S. Navy base at Guantánamo Bay, Cuba.

Guantanamo detainees bow during Islamic prayer inside Camp 4 at Guantánamo in December 2006. Omar Khadr is held in this prison camp as he awaits trial. BRENNAN LINSLEY / ASSOCIATED PRES

In this Oct. 2, 2007 photo, cleared for release by a Pentagon official, a soldier stands between beds in a barracks style detention area for cooperative captives called Camp Four at the U.S. Navy Base at Guantanamo Bay, Cuba. Omar Khadr is held in this prison camp as he awaits trial. CHIP SOMODEVILLA / GETTY IMAGES

Omar Khadr's mother Maha Elsamnah, left, his sister Zaynab Khadr, and his brother Karim are seen in their house in Toronto on Tuesday, July 15, 2008. Jailhouse video of Omar Khadr under interrogation by a Canadian spy service agent, the first public glimpse of a detainee at Guantánamo Bay, was released Tuesday. ADRIAN WYLD / ASSOCIATED PRESS

In this screen grab from a 2003 US Department of Defense surveillance video and released Tuesday July 15, 2008 by Omar Khadr's defense lawyers, the Canadian youth is shown in an interrogation room at the Guantánamo Bay Navy base prison camp while being questioned by members of the Canadian Security Intelligence Service.

In this image taken from a 2003 U.S. Department of Defense surveillance video and released Tuesday July 15, 2008 by Omar Khadr's defense lawyers, Omar Khadr is shown in an interrogation room at the U.S. Navy base at Guantánamo Bay, Cuba, while being questioned by members of the Canadian Security Intelligence Service. ASSOCIATED PRESS

This 2002 photo provided by the Khadr family shows Omar Khadr, a Canadian citizen now held as an "enemy combatant" at the U.S. Navy base in Guantánamo Bay, Cuba. Human rights groups have long called on Canada to pressure the United States to release Khadr who was captured in Afghanistan in 2002. KHADR FAMILY via CANADIAN PRESS

A friend, left, comforts Maha Khadr during a news conference in Toronto Wednesday, Feb. 9, 2005 as they listen to how Omar Khadr was treated. The mother and attorneys representing the teenager being held at Guantánamo Bay, accused of killing an American soldier while fighting for the Taliban in Afghanistan, said that Khadr had been tortured and mentally abused by U.S. military interrogators and denounced Ottawa for "abandoning" him. ADRIAN WYLD / CANADIAN PRESS

This June 2007 courtroom sketch by artist Janet Hamlin, and approved for release by U.S. military screeners, shows Omar Khadr, then 20, at extreme left, with a full beard grown in his years at Guantánamo. To his right are civilian and military defense attorneys as well as the prosecution team. Army Col. Peter E. Brownback III, the judge, is in a black robe. JANET HAMLIN / POOL SKETCH ARTIST

This November 2006 sketch, cleared for release by a Pentagon official who required that some peoples' features be blurred, shows Canadian captive Omar Khadr, his image on the defense table TV monitor, plus defense lawyers facing off with Marine Col. Robert S. Chester, the presiding officer, at an earlier effort to stage a Military Commission at Guantánamo Bay, Cuba. By Pentagon rules at that time, the face of the detainee could ot be exposed. Names of defense team, from left, American University professors Muneer Ahmed and Rick Wilson, Marine Lt. Col. Colby Vokey, chief defense team counsel, and Army Capt. J.J. Merriam. JANET HAMLIN / ASSOCIATED PRESS/POOL SKETCH ARTIST

In this June 4, 2008 photo, a U.S. trooper jogs at the tent city which makes up the legal complex of the U.S. Military Commissions, at Guantánamo Bay U.S. Naval Base, in Cuba. BRENNAN LINSLEY / ASSOCIATED PRESS

Canadian Omar Khadr, at left in an undated photo taken before his capture in Afghanistan at age 15, and at right, at age 22. The most up-to-date public photo of the long-held captive was taken last year by the International Committee of the Red Cross inside a prison camp at the U.S. Navy at Guantanamo Bay, Cuba, where he has been held as a war prisoner since age 16.

An Army guard walks the hallway at Camp 5, for maximum security, low value detainees at the U.S. Navy base Guantanamo Bay, Cuba. Omar Khadr is held here, on the block set aside for convicted war criminals. WALTER MICHOT / MIAMI HERALD STAFF