5 things: Obama calls Franklin Regional principal ... Chevron cited in Greene County well fire ... Mylan to market generic migraine medication ... Airport traffic down in February ... Stocks drop (Video)

Here are five things to know in Pittsburgh-region business for Friday, April 11, 2014: Obama calls Franklin Regional principal President Barack Obama spoke Thursday afternoon to Franklin Regional High School Principal Ron Suvak following Wednesday's knife rampage that injured nearly two dozen students...