Did the national Emergency Alert System mistakenly play Lady Gaga?

“It’s 2012 and our emergency alert system still sounds like a Speak and Spell and looks like an Atari 2600,” wrote one among a range of instant reactions broadcast on Twitter.  The tweet was apparently a response to the 1960s-style black and white lettering of the television message. — Did the national Emergency Alert System mistakenly play Lady Gaga?