2. Here’s an example of what an LRAD sounds like. Be warned, video gets very loud 24 seconds in.
- U.S. Republican presidential candidates will debate Saturday at 9 p.m. ET on CBS for the first time since Donald Trump's win in New Hampshire.
- Up to 150,000 penguins may have been killed by an iceberg blocking their access to the sea.
- And how well do you know what happened in the news this week? Take our quiz.