A jury of nine military officers deliberated for just under an hour before condemning Ali Hamza al-Bahlul at Guantanamo's second war-crimes trial. Al-Bahlul was convicted of 35 counts of conspiracy, solicitation to commit murder and providing material support for terrorism.
"The result was a foregone conclusion," notes CBS News chief legal analyst Andrew Cohen, who adds that the al-Bahlul case is unlikely to set any meaningful precedents for future military tribunals.
"The government can certainly call it a win," though, Cohen says.
The military has not said where he will serve his sentence.
The 39-year-old Yemeni defiantly admitted joining al Qaeda, accused the U.S. of oppressing Muslims for 50 years and said "we will fight any government that governs America."
"We are the only ones on Earth who stand against you," al-Bahlul said, adding that the U.S. has only itself to blame for the Sept. 11 attacks.
"Whoever said this happened out of nowhere is an idiot," he said. "You have started the war against us."
The lead prosecutor, Army Maj. Daniel Cowhig, said al-Balhul has shown no remorse or regret.
"When will it be safe for this man to leave confinement? Never," Cowhig said.
Al-Bahlul was not accused of participating in the Sept. 11 attacks, but prosecutors and witnesses said he was so close to bin Laden that he hooked up a satellite receiver so the pair could hear live radio coverage of the attacks as they huddled in Afghanistan's Khost province.
Prosecutors said he also acknowledged to interrogators that he was al Qaeda's media chief, made propaganda videos that inspired terrorists to attack the U.S., and arranged for lead Sept. 11 hijacker Mohamed Atta to swear a loyalty oath to the al Qaeda chief.
Al-Balhul called the military tribunal a "legal farce" and refused to mount a defense. His Pentagon-appointed lawyer stayed silent during the trial, refusing to even answer questions from the judge.
Witnesses at his sentencing hearing included the father of a sailor killed in the 2000 attack on the USS Cole - which was featured in a video the military says al-Bahlul produced to train and inspire al Qaeda terrorists in Afghanistan.
Gary Swenchonis Sr., whose son Gary was killed in the attack, said he was devastated that al-Bahlul's video has been widely available on the Internet.
"It's pervasive," said Swenchonis, of Rockport, Texas, his voice thick with emotion. "That's what's so bad. That's what's so wrong."
Al-Bahlul, who was brought to Guantanamo in 2002, is the second prisoner to go through a war crimes trial under the special military commissions system. Former bin Laden driver Salim Hamdan was convicted in August and sentenced to 5 1/2 years in prison.
The jury dismissed one count of conspiracy and one count of providing material support for terrorism.