11/6: U.S.: Explosion heard on Russian plane cockpit recording; 3-year-old learns the meaning of "happy tears"
Suspicion that a bomb brought down the Russian plane grows; U.S. officials say the sound of an explosion can be heard on the plane's cockpit recorder; Since parents are waiting longer to have children, a new study has looked into the effects of chemotherapy on babies whose mothers were treated for cancer during pregnancy.