‘We lost sight of him’: Radio traffic shows failed search for Trump rally shooter  The Washington PostTrump shooting probe: Secret Service says it didn’t have access to radio traffic that could’ve been crucial  ABC NewsA ‘unique’ command set up contributed to security failure at Trump shooting: Secret Service  NBC NewsUSSS chief says sniper teams at Trump rally unaware of assailant until shots fired  The Associated PressSee Where Countersnipers Could Have Stopped the Trump Rally Gunman  The New York Times