Immigrants who claimed they were illegally detained at the U.S. border because they wrongfully appeared on the Department of Homeland Security's watch list should pursue their constitutional claims against the government individually and not as a class, the 7th Circuit ruled.

Judge Easterbrook reversed class certification for a group of immigrants whose re-entry into the United States was delayed because they showed up on the watch lists as potential terrorists or otherwise dangerous individuals and were carefully screened. Some of the plaintiffs said they never belonged on the list in the first place, because they posed no threat of terrorism or other violent behavior. Others said they are not actually on the list, but have been mistaken for a listed person with a similar or identical name.

All claimed the FBI and the Department of Homeland Security need to find a better system of classifying potentially threatening individuals and removing those who do not belong on the list.

They sued for damages, claiming government agents violated their rights by delaying their re-entry and by pointing weapons at them.

Easterbrook called the latter claim "questionable" and pointed out that the nation has an inherent authority to protect its borders. Even so, he rejected plaintiffs' request for an injunction covering "just about every aspect of entry procedure," including the degree of suspicion required for inquiry, the way officials confirm a person's identity, and how the FBI closes its investigations. They sought to strip the executive branch of its role in reshaping the system and to make the necessary reforms through an injunction covering larges classes: one for detained travelers and another for the relatives and travel companions of detained travelers.

"It isn't hard to see problems with these class definitions," Easterbrook said, launching a list of bulleted issues, including that the classes "grow or shrink with the plaintiffs' contentions as the case progresses," and that the word "detention" could mean "anything from 'stopped for 60 seconds to present a passport' to 'held incommunicado for more than a day.'"

The court concluded that the plaintiffs' claims are "best handled by individual suits for damages."

The Supreme Court ruled Thursday that Americans have a right to own guns for self-defense and hunting, the justices' first major pronouncement on gun rights in U.S. history.

The court's 5-4 ruling struck down the District of Columbia's 32-year-old ban on handguns as incompatible with gun rights under the Second Amendment. The decision went further than even the Bush administration wanted, but probably leaves most firearms laws intact.

The court had not conclusively interpreted the Second Amendment since its ratification in 1791. The amendment reads: "A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

The basic issue for the justices was whether the amendment protects an individual's right to own guns no matter what, or whether that right is somehow tied to service in a state militia.

Writing for the majority, Justice Antonin Scalia said that an individual right to bear arms is supported by "the historical narrative" both before and after the Second Amendment was adopted.

The Constitution does not permit "the absolute prohibition of handguns held and used for self-defense in the home," Scalia said. The court also struck down Washington's requirement that firearms be equipped with trigger locks or kept disassembled, but left intact the licensing of guns.

In a dissent he summarized from the bench, Justice John Paul Stevens wrote that the majority "would have us believe that over 200 years ago, the Framers made a choice to limit the tools available to elected officials wishing to regulate civilian uses of weapons."

He said such evidence "is nowhere to be found."

Justice Stephen Breyer wrote a separate dissent in which he said, "In my view, there simply is no untouchable constitutional right guaranteed by the Second Amendment to keep loaded handguns in the house in crime-ridden urban areas."

Joining Scalia were Chief Justice John Roberts and Justices Samuel Alito, Anthony Kennedy and Clarence Thomas. The other dissenters were Justices Ruth Bader Ginsburg and David Souter.

Gun rights supporters hailed the decision. "I consider this the opening salvo in a step-by-step process of providing relief for law-abiding Americans everywhere that have been deprived of this freedom," said Wayne LaPierre, executive vice president of the National Rifle Association.

The NRA will file lawsuits in San Francisco, Chicago and several of its suburbs challenging handgun restrictions there based on Thursday's outcome.

The capital's gun law was among the nation's strictest.