sunday, just days away. therefore, they're going to be testing the substance to see what it is, try to determine whether there's anything to be worried about, whether this is actually a hoax, and, of course, track down the source of the letters, who sent them. that is a part of what they're looking at. wolf? >> susan, hold on a minute. tom fuentes is with us. if someone thinks this is cute fun and does this, sends sort of a powder, let's say not a dangerous powder, in these kinds of lit irs to the hotels near the site of the super bowl and to rudy giuliani, that's major crime, isn't it? >> yes, it is, wolf. whether it's dangerous or not dangerous, they consider it a federal crime. authorities do not take it lightly just because ow whatever you're seeing. the tremendous response that has to go into effect, the fear that it raises with the public and