Los Angeles Mayor Antonio Villaraigosa (left) and Los Angeles County Supervisor Zev Yaroslavsky hold souvenir concrete chips as they celebrate the demolition of two lanes of the Mulholland Drive bridge over I-405 ahead of schedule Sunday. Reed Saxon/AP hide caption

For a long time, doctors thought tinnitus was a problem in the ears. They now think it's more of a problem in the brain. iStockphoto.com hide caption

Mindfulness-Based Stress Reduction teaches simple techniques — such as using slow breathing — to focus your attention. iStockphoto hide caption

A worker tests components on a model of the space shuttle before wind tunnel testing. NASA hide caption

A voter casts a ballot in a Democratic primary on July 12 in Wisconsin, one of seven states to enact voter ID laws this year. Dinesh Ramde/AP hide caption

Glenn Carle served for 23 years in the Clandestine Services of the Central Intelligence Agency. Sally J. Carle hide caption