“How many more innocent American lives must be taken before we say enough?” President Biden asked that tonight in an address to the nation in which he called for a ban on assault weapons and high-capacity magazines. Plus, the latest from Tulsa, Oklahoma as police say a former patient walked into a hospital and killed four people before turning the gun on himself. Also, a state lawmaker in Texas says the Uvalde school district police chief was apparently not informed about 911 calls coming from inside Robb Elementary School where a gunman slaughtered 19 children and two teachers.