received. there's a lot of tracing back to see what would happen. but you can imagine if you were staying at one of these hotels and you're attending the super bowl or for that matter are there for any other reason, it's unnerving to say the least. >> to put it mildly. hold on for a moment, susan. tom flint, former assistant fbi is on the phone. tom, you're listening to the news that's developing. to the viewers just tuning in, they found six areas of unknown white powder at hotels near the site of the super bowl and they sent a letter to former mayor rudy giuliani. they found a white substance as well. they're trying to determine if it's dangerous, a hoax, what's going on. just quickly walk us through if this is a real threat or someone thinks it's a fun idea to make people a little crazy right now.