UPDATE 1-Viacom CEO asks court to set trial over trust by end-Sept
May 26, 2016 at 14:27 PM EDT
May 26 (Reuters) - Viacom Inc Chief Executive Officer Philippe Dauman has asked a Massachusetts court to expedite a legal challenge to his removal from a trust that will determine the company's future after controlling shareholder Sumner Redstone dies or is deemed incapacitated.