 Nearly 54,000 flights are expected to take off today. Sunday could potentially beat today's pace. During the height of the summer travel season, this Fourth of July is shaping up to outpace Memorial Day. Walgreens announced that it will close a significant number of its 8,700 stores. The company, which also operates Duane Reade, did not specify an exact number or where the closures would be. They only said a meaningful percent will be shuttered.