At this point, it is an overused joke. Someone in a movie steps up to a microphone to say something serious or awkward, and when they start talking, a screeching sound can be heard. For as rote as it ...

New York (CNN) — Today was the day for the US government’s big emergency alert drill, which sent a test message to every TV, radio and cell phone in the nation. Starting at approximately 2:20 pm ET on ...