potentially at least one twister that s already touched down and caused quite a bit of damage. these image just coming from our affiliate wfla. and we already know that there s been a situation at an airport in the tampa area as well with a building collapsing and possibly up to 70 people who ve been trapped. we know that emergency preparedness, emergency response teams are on the way to try to get to those folks. and when we get more information, we ll be able to bring that to you and chad myers will be along with us throughout afternoon to continue to talk about this system making its way from the west don t florida onto the east coast potentially. meantime, let s talk about overseas now. and rebel fighters in libya retreating in the face of attacks by moammar gadhafi s forces. of the rebels had gained control of key towns on their march westward, but gadhafi forces pushed them back. cnn s ben wiedeman reports from the city where the rebels may have stalled. reporter: to say this