BLITZER: The younger brother of the Florida school gunman said he feels guilty about the shooting, and he wonders whether he could have prevented the massacre. In an interview with investigators, Zachary Cruz discussed his relationship with his brother, Nikolas Cruz, seen here during a court appearance. Zachary told authorities he bullied Nikolas when they were younger. He said he now regrets doing that together with his friends. He wishes he had been nicer to his brother. The massacre at the Marjory Stoneman Douglas High school left 14 students and three teachers dead. Certainly, set off a national debate over gun control here in the United States. That debate clearly continues right now. That's it for me. Thank you very much for watching. I'll be back at 5:00 p.m. Eastern in "THE SITUATION ROOM." For our international viewers, "AMANPOUR" is next. For our viewers in North America, "NEWSROOM" with Brooke Baldwin starts right now.</s>BROOKE BALDWIN, CNN ANCHOR: Wolf, thank you so much. Good to be back. I'm Brooke Baldwin. You're watching CNN. The president has sent shock waves through global markets with the threat of a once-in-a-generation trade war, a trade war the president insisted was a good thing. But then, in front of cameras just a short while ago, said --
Brother of Florida School Shooter Speaks Out.