UCLA professor asked students to take final exam during lockdown

Amid fears of a shooter on campus, students of a UCLA stats professor were getting an email to find a computer and to take their final exam

• Jun 2, 2016

New details in deadly shooting on UCLA campus

Murder-suicide that left two men dead forces lockdown of campus and LAPD to enact "citywide Tactical Alert"

• Jun 1, 2016

White House lockdown has been lifted

A woman threw a metal object over the fence on the north side of the complex

• May 30, 2016

Bear puts Southern California schools on lockdown

Deputies had been chasing around the bear in Rancho Cucamonga east of Los Angeles

• May 18, 2016

Joint Base Andrews locked down over woman's bomb threat

Woman showed up claiming to have bomb vest; was taken into custody

• May 12, 2016

Capital murder suspect escapes Miss. jail

Schools in the area were on lockdown after Rafael McCloud, 33, escaped from the Warren County jail early Wednesday wearing a jail employee uniform

• Mar 2, 2016

Student film prompts scare, puts Arkansas State on lockdown

Campus was on lockdown and students told to shelter after reports of two or three armed men near student union, apparently a false alarm

• Feb 14, 2016

Hunt for Paris suspect shuts down Belgian capital

Police sweep up 21 suspects in raids focused in Brussels, but Salah Abdeslam not among them, and life far from normal as new week begins

• Nov 23, 2015

Fairfield, Conn. schools in "lockout" mode following threat

Authorities say several schools in the western Connecticut town received threats mentioning pipe bombs

• Oct 23, 2015

Baltimore corrections facility violence leaves 14 hurt

The incident stemmed from a single conflict between an inmate and an officer, but later escalated

• Aug 31, 2015