Obama: We \\\"Cannot Fully Know\\\" Motive For This Tragic \\\"Crime\\\"

President Obama says "we cannot fully know" what led Army Maj. Nidal Malik Hasan to kill 13 people and wound 38 others at Fort Hood, Texas Thursday.

Hasan reportedly shouted "Allahu Akbar!" before the killings, wrote Internet postings justifying Muslim suicide bombings, considered U.S. forces the enemy, and opposed American involvement in Iraq and Afghanistan as wars on Islam. His rampage at Ft. Hood has the markings of an act of Islamic terrorism.

But in his weekly address, Obama says, "We cannot fully know what leads a man to do such a thing." And while the killings were "heartbreaking" and "despicable" and "devastating," the president says, it is important to remember not only that Hasan's fellow soldiers responded bravely in coming to the aid of the wounded but also that "Americans of every race, faith and station" have served in the U.S. armed forces. "They are Christians and Muslims, Jews and Hindus and nonbelievers," Obama says. "They reflect the diversity that makes this America."