First lady Melania Trump cut the ribbon Thursday as the Washington Monument reopened to the public for the first time in three years. The 555-foot stone obelisk closed in September 2016 in order to replace the aging elevator and upgrade security systems. Accompanied by a group of local fourth graders, Trump took the new high-speed elevator to the observation floor near the top, which offers a commanding 360-degree view of the entire District of Columbia. The monument has been closed off and on for most of the past eight years. An August 2011 earthquake left cracks in the stones near...