WASHINGTON (Reuters) - Guantanamo Bay prisoners can go before U.S. federal judges to challenge their years-long detention, the Supreme Court ruled on Thursday in a landmark decision that delivered another setback for President George W. Bush's war on terrorism.

By a 5-4 vote, the nation's highest court struck down the law Bush pushed through the Republican-led Congress in 2006 that took away the habeas corpus rights of the terrorism suspects to seek full judicial review of their detention.

"We'll abide by the court's decision. That doesn't mean I have to agree with it," Bush told a news conference in Rome, where he was on a weeklong European visit. "We'll study this opinion and we'll do so ... to determine whether or not additional legislation might be appropriate."

Supreme Court rules for Guantanamo prisoners. Also read a related story at Salon in which I quote the most important part.

the court upholds the fundamental right to habeas corpus