Counter snipers had their weapons trained on the assassin and were looking through their scopes, but didn't open fire until the

Counter snipers had their weapons trained on the assassin and were looking through their scopes, but didn’t open fire until the shooter had fired several shots and Trump was on the ground. The roof from which the potential assassin fired should have been protected or a screen erected to prevent a line of sight to Trump and the stage. It was only 430 feet from the stage, well within easy range for a potential assassination attempt. Source: Wartime Media - Ukraine / Russia / China / Etc