Aug 16 (Reuters) - Jose Padilla, a U.S. citizen held by the military for 3 1/2 years as an "enemy combatant," was convicted on Thursday on all three counts against him in a U.S. terrorism support trial.

Padilla, a convert to Islam who initially was accused of plotting a radiological "dirty bomb" attack, faces a possible life prison term, as do two co-defendants convicted with him.

Following are some of the more high-profile legal cases in the Bush administration's efforts to battle terrorism.

* Zacarias Moussaoui, the only person charged in the United State in connection with the Sept. 11 attacks, pleaded guilty to six counts of conspiracy. He was sentenced on May 4, 2006, to life in prison after a jury refused to order the death penalty for him.

* Richard Reid failed in an attempt to blow up an American Airlines plane from Paris to Miami in December 2001 after passengers and crew tackled him as he tried to ignite explosives in his shoe. He was sentenced to life imprisonment in January 2003 after pleading guilty to all charges.

* John Walker Lindh, originally called the "American Taliban," was captured in Afghanistan in 2001 fighting alongside suspected Taliban members. Originally charged with 10 major crimes, he ended up plea bargaining to two lesser charges and was sentenced in 2002 to 20 years in prison without parole.

* Sami Al-Arian, a former University of South Florida, professor, was charged with giving money and support to the Palestinian Islamic Jihad, which has been designated a terrorist organization by the United States. But a jury acquitted him of eight of the 17 counts and was deadlocked in favor of acquittal on the others. Rather than a retrial, he pleaded guilty in April 2006 to one count of conspiracy to help fund terrorists and agreed to be deported.

* Ahmed Abu Ali, an American who was arrested in Saudi Arabia in June 2003 and returned to the United States, was charged with plotting with al Qaeda to kill U.S. President George W. Bush. Most of the evidence against him was obtained in Saudi Arabia and he claimed he was tortured into confessing. A judge dismissed that argument and he was sentenced in March 2006 to 30 years in prison.

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