welcome back. some stories making news this morning -- this just in -- russian president vladimir putin has signed a bill banning americans from adopting russian children. scientists plan to study the dna of adam lanza, the 20-year-old who shot and killed 26 people at sandy hook elementary school in connecticut december 14th. they hope to find an abnormality that could possibly point to an inclination toward violence. hillary clinton will return to work next week after the stomach flu and a concussion sidelined her for three weeks. some good news for law enforcement. the number of police officers killed in 2012 fell by 23%.