LX March 31, 2020 1:42 pm The Emergency Alert System: Everything You Need to Know We’ve all heard it: the Emergency Alert System. That loud sound signifying a national emergency. But who decided to use that sound? And is it designed to be that annoying? US & World Videos 48:28 This man wanted to read a magazine about Latino executives in the US, so he created one 0:53 San Diego City Council Committee approves San Diego's next police chief 2:38 Family seeks public's help after deadly hit-and-run near Balboa Park 4:17 Kelly Clarkson meets NHL's first female Stanley Cup keeper 2:38 Meet the pair of giant pandas coming to the San Diego Zoo from China