Clinton tacks to Sanders' left with new gun-control push. (New York Magazine)
Oregon gunman's father dismayed by the lack of gun legislation. (New York Times)
Bernie Sanders draws big crowds in Massachusetts. (Boston Globe)
Koch brothers, other mega donors warm to Carly Fiorina. (Reuters)
Turkish F-16s intercept Russian war plane after airspace violation. (NBC News)
U.S. aims to put more pressure on ISIS in Syria. (New York Times)
Doctors Without Borders says it's leaving Kunduz, Afghanistan after airstrike on hospital. (New York Times)
Nobel Prize week begins with an award in Medicine. (AP)
What are you reading this morning? Let us know in the comments, please.