United States President Donald Trump tweeted his "thoughts and prayers" following Tuesday's shooting at YouTube's headquarters. However, many people responded by urging the president to take policy action. Chief among them was Jack Dorsey, co-founder and chief executive of Twitter:
Four people were injured in the attack at YouTube's San Bruno, California, headquarters. The shooter, identified in local media as Nasim Aghdam, died at the scene from a self-inflicted gunshot wound.