The Country’s Largest Drugstore Chain Is Closing About 200 Stores As It Expands On A One Billion Dollar Cost-Reduction Plan It Announced Last August. Deefield, Illinois, Based Walgreens Will Also Reorganize Its Corporate Operations And Streamline Its Information Technology And Other Functions. The Store Closings Amount To About Two Percent Of The 82-Hundred Drugstores It Runs In The U.S., Puerto Rico, And The U.S. Virgin Islands.