David Benke, the middle school teacher who tackled a gunman at his school, says he knew he had time to tackle the shooter but wishes he had acted a little faster.

A British Labrador whose bomb-sniffing exploits helped save lives in Afghanistan is awarded a medal for canine courage from London's Imperial War Museum.

Two parts of a Hebrew Biblical manuscript separated for centuries and over continents are now rejoined and on display at a museum in Jerusalem. The separated fragments make up the Song of the Sea, sung by jubilant Israelites after fleeing slavery in Egypt and witnessing the destruction of the pharaoh's armies in the Red Sea.

While the search for a vaccine continues, an AIDS researcher at the South African Center for Epidemiological Modeling and Analysis says it's possible to eliminate HIV in 40 years with medicines already at our disposal. The strategy involves universal testing for the virus and then treatment with antiretrovirals -- an expensive method, but one that would save lives.

A new study shows that a mid-day nap not only refreshes but can also increase your ability to learn. Not only do prolonged periods of wakefulness make brains sluggish, but adults who took a nap performed learning exercises better.

Robin De Haven, a 28-year-old Iraq war veteran, talks about how he helped five people escape from the burning Austin office building that was struck by a small airplane.