Prosecutors have upgraded charges in a gun trafficking case in which they allege at least two Delta employees helped take guns on commercial flights in carry-on luggage from Georgia to New York. Brooklyn District Attorney Kenneth Thompson says five people have been charged. Three face charges of aggravated enterprise corruption, which carries a penalty of up to life in prison upon conviction. They had faced enterprise corruption charges before. Four of the people were arrested in December 2014. The fifth worked as a Delta ramp agent and was arrested last week in Georgia. Prosecutors say weapons including an AK-47 were carried aboard commercial jets. More than 150 guns were seized during the seven-month gun trafficking probe.<br/>