590721 - DALLAS LATEST-VO

South High School placed on brief lockdown

590719 - DALLAS CHIEF SOUND

Shooting leads to neighborhood lockdown in Bowie, Maryland

590723 - DALLAS PROTEST SHOOTING-VO

LIVE: U.S. NAVY ACADEMY ON LOCKDOWN

590724 - DALLAS shooting video-VO

Person shot during lockdown at Naval Academy in Annapolis

590729 - Peaceful March 10P

North Texas school put on lockdown after an incident in a nearby school

590722 - DALLAS POLICE CHIEF SOUND-SOT

Police: Student claiming to have weapon prompts lockdown at Reynoldsburg HS Summit Campus

590728 - More Josh Shooting vo

Republican National Committee headquarters sent into lockdown

590730 - Police Searching vo

Brief multi-school lockdown lifted after shooting, suspect still at large

590738 - Hospital reax 6a PKG

River Ridge High School students back in class following lockdown

590737 - Dallas Shootinf Latest

Marysville-Pilchuck High School in lockdown after reported threat

590732 - Shooting Video 6a

Kingwood placed on lockdown after report of student with possible weapon

590731 - REPORT-VO

Lockdown lifted after Franklinton Prep High School struck by gunfire

590726 - Eye Witness 10P

Jeter Elementary in Alvin ISD elementary school on lockdown after a shooting near the school

590725 - DALLAS SHOOTING VO 3

Montgomery College Rockville campus briefly placed on lockdown due to shooting

590727 - Hospital victim scene 6a

North Texas school briefly placed on lockdown after student brought fake gun to school: officials

590720 - DALLAS LATEST-VO_2

Raw video: Texas City High School placed on lockdown following threat

What we know about the community college lockdown in South Portland

Police: Student detained after gun threat prompts lockdown at Hilliard Bradley HS

One injured in shooting that prompted lockdown at college

Parents frustrated with lack of communication during lockdown at Columbus middle school

Georgia high school on lockdown after gunfire was reported

HPD: Suspect in ballistic gear opens fire, shot by officers in SW Houston

Police respond to swatting call that prompted several Newark schools to be placed on lockdown

Mall of America lockdown lifted after shooting, no injuries

Lockdown lifted at Nationwide Children's Hospital after reports of an 'armed man'

Apartment shooting, police standoff in Euless causes multiple nearby schools to go on lockdown

Elementary school on lockdown after students claim someone in restroom ceiling

Mother, daughter describes shock during lockdown at Pickerington junior high school

Lockdown lifted at Naval Academy after one person was shot

Court hearing held for armed carjacking suspect who caused Kentridge High School lockdown

What we know about the community college lockdown in South Portland

What we know about the community college lockdown in South Portland

Lockdown lifted at Alvin ISD school after shooting nearby, Brazoria County Sheriff's Office says

Lockdown lifted at 3 Columbus City schools on southwest side after nearby shooting

15-year-old taken into custody after Columbus shooting that put 3 schools on lockdown

2 arrest after police chase of possible stolen car; school temporarily put on lockdown