Investigators say the 31-year-old California man wanted to kill as many high-level officials as possible.
The gunman showed no remorse and grumbled about an injury he sustained in the attacks, said investigators.
Brown University student Mia Tretta describes her emotional response at surviving a mass shooting on her college campus, having experienced gun violence in school as a child.
Abigail Zwerner sued a school administrator, claiming they had ignored a warning about the gun.
Taki Allen, 16, said he was eating a bag of Doritos after football practice before being handcuffed by police.
The Trump administration wants the law upheld after a Texas man challenged a gun charge.
The two children killed in the shooting have been identified as Fletcher Merkel, eight, and Harper Moyski, 10.
Harper Moyski, 10, and Fletcher Merkel, 8, were praying when they were gunned down at school on Wednesday.
Authorities say Shane Devon Tamura travelled across the country from Las Vegas to open fire inside the skyscraper.
