The arena that hosted the 2017 "Billboard" Music Awards opened  on what date?
2017 Billboard Music Awards The 2017 "Billboard" Music Awards was held at the T-Mobile Arena in Las Vegas on May 21, 2017. The list of nominees was announced on April 10, 2017. Non-televised awards were announced on "Billboard" website the same day as the main ceremony.
2017 Manchester Arena bombing The 2017 Manchester Arena bombing was an Islamic terrorist attack in Manchester, United Kingdom. On 22 May 2017 a shrapnel-laden homemade bomb was detonated as people were leaving Manchester Arena following a concert by the American singer Ariana Grande. Twenty-three people were killed, including the attacker, and 250 were injured.