The U.S. Has a Secret Model of Iran's Nuclear Facilities 

Back in the days of the Manhattan Project, the government set up a string of National Labs devoted to creating nuclear weapons. Now, those labs are playing a role in the opposite task: stopping them. A secret facility in Tennessee that replicates Iran’s nuclear capabilities was key to the recent negotiations. » 4/22/15 4:55pm 4/22/15 4:55pm

Self-Correcting Laser Rifle Sight Gives the Most Accurate Shot Yet

When you're aiming at a target two miles away, the slightest perturbation could end up causing a catastrophic miss - not good enough for today's military. Until guns can aim themselves, snipers need the most accurate weapons possible. Engineers at Oak Ridge National Laboratory came up with a laser-guided correction… » 4/21/11 9:20pm 4/21/11 9:20pm