 But the tower could not get in contact with the pilots. The plane later landed safely in Baltimore. The NTSB and FAA are investigating. Alex Stone, ABC News. Walgreens will be closing what it calls a significant number of stores across the U.S. The drugstore chain made that announcement Thursday and said it plans to close underperforming stores as part of a multi-year strategy. Walgreens didn't specify how many of its stores will be closing.