NASA simulates asteroid heading toward Earth in defense exercise

USA TODAY - For more and to sign up click here Patrick Djordjevic (NewsNation) — NASA's preventative doomsday approach reached new heights with a test simulating a hypothetical asteroid set to hit Earth in 2038, according to a report released this week. The simulation was the fifth installment of the Planetary Defense Interagency Tabletop Exercise, wherein NASA, the U.S. government and international…