White House Lockdown Today | White Security incident prompts Hazmat response in Washington

Report of Gunshot Prompts Lockdown at Washington High School

Assault Prompts Lockdown at North Carolina College

Mistaken report of shooter prompts lockdown of Andrews Air Base

No Evidence of Credible Threat at L.A. High School After Phone Call Prompts Lockdown

Shooting at Dallas Love Field airport prompts lockdown

High Speed Chase turned Bailout Prompts Elementary Lockdown

People queue outside Costco Wholesale store in Chingford, London as coronavirus prompts fears of lockdown

Shooting Prompts NC Campus Lockdown

Possible Active Shooter Prompts Lockdown at Alabama Military Installation

Parents Relieved to See Kids Safe After School Threat Prompts Lockdown

Man prompts lockdown at Phoenix grocery store

Hallway Prank Prompts Lockdown at Virginia High School

Disturbing Social Media Post Prompts Lockdown at Connecticut School

Active shooter at Texas lodge prompts lockdown reports

West Bengal Govt's Wrong Decision Prompts Thousands Of Laborers Gather Amid Lockdown

Passenger incident prompts closure of Oxford Circus underground station in London

Shooting Near Los Angeles School Prompts Campus Lockdown

'Very positive': UK vaccine prompts immune response in

Explosion at historic Georgia Guidestones prompts bomb team response

Kellogg's Plan to Replace Striking Workers Prompts Response from President Biden