In that AT&T commercial featuring the long orange streamers, are they real or trick photography?

It’s that commercial featuring the Nick Drake song playing in the background, and those long orange streamers are unfurling from the top of the St. Louis Arch, Hoover Dam, and all of the buildings in Las Vegas. Then, they say that 97% of all Americans are covered by AT&T. It’s just that a tremendous amount of cloth would be required to pull this off if it was real, so I’m thinking it’s trick photography.

This website explains the whole commercial. Pretty interesting.

http://www.moving-picture.com/index.php/los-angeles/877-atat-blanket.html