9 AM ET: Wisconsin shooting witnesses, TikTok fighting ban, Trudeau in trouble & more

Witnesses recount the chaos of a tragic school shooting in Madison, Wisconsin, while international tensions rise as Ukraine claims responsibility for an explosion that killed a Russian general. TikTok faces a critical legal battle, hoping the Supreme Court will intervene to prevent a potential ban in the US. Meanwhile, Canadian Prime Minister Justin Trudeau navigates a political storm following a resignation, and severe weather alerts warn of high winds and wildfires in the western US.