why not?

Three detainees at the U.S. military detention facility at Guantanamo Bay, Cuba, hanged themselves in their cells yesterday morning, the first inmates to die at the remote island prison since it opened in early 2002, according to military officials.
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Harry B. Harris Jr., who commands the Guantanamo Bay prison (…) described them (i suicidi!) as having close ties to terrorist organizations in the Middle East and said their suicides were "not an act of desperation, but an act of asymmetric warfare against us."
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Defense Department officials have long expressed their pride in not having lost a single life among the approximately 759 detainees who have at one time been incarcerated at Guantanamo Bay. There have been 41 suicide attempts by about 25 individual detainees -- many by hanging -- but in each previous case, medical personnel were able to save them.
The United Nations anti-torture panel called last month for the United States to close the facility, while human rights groups have railed against the treatment of detainees there and argue there is no appropriate judicial process in which they could challenge their detention.