i m heather childers in for martha maccallum. dallas, thousands of travelers stranded. many were forced to sleep on cots after findings out their flights were grounded. it is so cold bill: how cold, is it, heather? so cold in the lonestar state planes getting stuck on ice moments after landing on the tarmac. bill: air travel is a mess across the country. 1200 flights canceled today. better than 2800 canceled on sunday. casey stiegel getting a taste, live at dollars fort worth international airport. day four of troubles there continue, casey. reporter: they do, bill. the lines are a big improvement from over the weekend. this started last thursday when north texas was hit with a whopper of an ice storm. on friday more than 90% of the total flights canceled. that is affecting thousands an thousands of people. it continues to do so here on this monday morning. walk here to take a look. this is what we saw rolled out by airport officials all weaken long. cots. nothing like