An attacker armed with two knives wounded as many as 20 people in a stabbing rampage at a Pennsylvania high school on Wednesday — just one year to the day after a mass stabbing at a Texas college. There is currently no information linking the two events, officials warned. Fourteen students were injured in last year's rampage, making it one of the bloodiest knife attacks in U.S. history, while 20 people are reported injured in Wednesday's stabbing spree.
