. in our national lead, something you will not be able to ignore, and i've got to admit, this story really buggs a lot of people on my staff. loud, racket-making, watch out or you'll step on them with a crunch bugs called sicicadas. it's a story someone had to do. enter tom forman. >> the cicadas are on the move, a remarkable move called brood ten and when the males let loose with their mating call. >> that's airplane noise. we were in the center you wouldn't hear that airplane. >> reporter: this particular strain emerges in the mid-atlantic and a few midwestern states, living underground on tree roots and coming into the light only once every 17 years to fascinate