A heart-wrenching new film recounts the beheadings 10 years ago this week of 21 Coptic Christians at the hands of ISIS radicals. Yet the film, simply titled "The 21," also tells the poignant story ...

The 21-gun salute is one of the highest military honors, performed for dignitaries, heads of state and fallen service members. But what exactly is it? And why 21 shots? In military tradition ...