Cancellations, for holiday travelers last week. southwest airlines canceledrehan 42,000 flights to operate naon.b. brown: manny, thank you very much. of tonight, a man accused in the new year s eve attack on three new york city police officers near times square has been arrested and charged with attempted murder. cbs nancy chen reports on whether the assault was terror related. everybody off the sidewalk now! reporter: tonight authorities continue to investigate how a man wielding a machete managed to mount a chaotic new year s eve attack just blocks from ref elfers in times square. it was nuts for about a good hour. i heard a lot of people is screaming and yelling and i sought sirens. reporter: police say 19-year-old trevor bickford slashed two officers in the head just outside a security checkpoint and attempted to