Here, the blast destroys large veins that carry ... from an AR-15 can reach speeds of up to six football fields in a second was made using a 55 grain .223 Remington full metal case round fired ...

Colorado is poised to see a major change to its gun laws after the state Senate passed a bill that would effectively ban AR-15s, AK-47s, shotguns and pistols that hold more than 15 rounds.

A Colorado Springs police officer at the annual Medal of Valor ceremony in September. The city police department has responded to several mass shootings in recent years, and many officers now ...