Trump's Republican administration alleges the ban violates the Constitution's Second Amendment right to bear arms.
Bay Area students are taking part in a national school walkout to demand tighter gun control on the 19th anniversary of the Columbine shooting tragedy that left 12 students and a teacher dead nearly two decades ago.
Students of Columbine High School have been asked to participate in a day of service rather than join the National Walk Out on April 20.
April 20, 2017, marks the 18th anniversary of one of the deadliest school shootings in U.S. history.
Dan Ashley remembers the Columbine tragedy as Diane Sawyer brings us an exclusive look into a devastating day.
For the first time, the mother of one of the teens who killed 13 people at Columbine High School 17 years ago will speak exclusively to ABC's Diane Sawyer.