Taylor Swift Concert in Vienna Canceled Due to Terror Threat

Sheryl Sandberg Releases Documentary About Hamas Violence

US Law Enforcement on Alert for Terror Attacks During Solar Eclipse

4 Suspects in Deadly Moscow Concert Hall Shooting Appear in Court

How the FBI Caught the 2010 Times Square Bomber Terrorist

Israeli Woman, 25, Fended Off Terrorists at Kibbutz in 4-Hour Battle

At Least 1,450 Dead After Hamas Attacks Israel, Which Declares War

Wisconsin Couple Say They've Been Terrorized by 'Swatting' Campaign

Bike-Path Killer Sayfullo Saipov Remorseless During Sentencing Hearing

90 Bodies Found at Kenya Cult Where Followers Starved to 'Meet Jesus'