. >> analysts say the decision by c-v-s turns up pressure on its larger rival---walgreens--- to do the same. engineers found a large threat to the eco-system in the florida everglades. this burmese python was found during an inspection of levees on tuesday. it's 18 feet and two inches long. that's six inches short of the state record, which was broken last year. researchers had the snake killed, so it could be studied. they're concerned about the pythons eating the everglades' native species and their food sources. this week's snowstorm was quite a nuisance in the chicago area. now it's on to the northeast. pennsylvania is getting the worst of it. more than half a million homes are without power. half of all outbound flights are canceled in new york, boston and newark. the governors of new york, new jersey and pennsylvania have declared states of emergency. and some state employees in connecticut and massachusetts are being told to stay home because the roads are too treacherous. >> you don't want them to step burritos. they're taking your weather. >> ice storms are always an issue in