EDINBURG — As July bounces into the halfway mark, two local organizations are helping the local community in preparing for the return to school.The Rio Grande Valley Vipers, along with Driscoll, will hold the sixth annual Back to School Expo on Tuesday from 3 to 7 p.m. at the Bert Ogden Arena in Edinbur g.The purpose of the event is to help students from the region gear up for the upcoming school year — which is only about a month away for most people. Those who attend will have a chance to gain school supplies — at no cost to ...