Of particular concern: U.S. troops barred from using mine-resistant armored vehicles in urban areas during the day.

The image shows that proteins are created at connections between brain cells when a long-term memory is formed. Neuroscientists had suspected as much, but hadn't been able to see it happening until now.

The experiment also revealed some surprising aspects of memory formation, which remains a somewhat mysterious process.

The majority opinion sent a strong message to lower courts by questioning why schools and states should remain under the direction of federal courts for so many years.

The Court of Appeals "improperly substituted its own policy judgments for those of the state and local officials entrusted with the decision," Alito wrote.