The arena that hosted the 2017 "Billboard" Music Awards opened  on what date?
T-Mobile Arena T-Mobile Arena is a multi-use indoor arena on the Las Vegas Strip in Paradise, Nevada. Opened on April 6, 2016, the arena is a joint venture between MGM Resorts International and the Anschutz Entertainment Group.
Washington Coliseum The Washington Coliseum, formerly Uline Arena, is an indoor arena in Washington, D.C. located at 1132, 1140, and 1146 3rd Street, Northeast, Washington, D.C. It was the site of the first concert by The Beatles in the United States.