#VIDEO: A man armed with a knife attacks passersby in Denmark and is cut down by them.

Panic grips Brooklyn station after shooting and possible bomb attack

#VIDEO: People run in terror after gunman open fire inside church in London

Suspect, who escaped after Brussels attack, shared a video in which he said in Arabic that he "killed 3 infidels"

.#VIDEO; The Louvre museum in Paris was evacuated for fear

Brussels Shooting SUSPECT FREE

Brussels shooting suspect still at large after 4 hours after killing two people and wounding one more

#VIDEO: Train smashes into cop car on tracks with suspect in back seat

#VIDEO: 3-year-old boy rescued from the rubble after Turkey earthquake

#VIRAL: Brothers take a selfie and get struck by lightning; here's the photo.