What's this phenomenon in the sky? AREA 51 pic inside?

Question

This photo was taken around sunset from the WEST side of Las Vegas, facing EAST (so the sun was setting behind me), the direction of Area 51:

http://i130.photobucket.com/albums/p268/virgogh/sky.jpg

See the two streaks of blue sky cutting through the orangey sunset haze? What could have caused that?

Answer 1

electromagnetic radiation  did you see any airplanes in the area

Answer 2

contrails from jets from the local air force base?

Answer 3

High altitude winds, looks like normal pre twilight darkness if you ask me.

Answer 4

It is God's derrier.

I have seen it before twelve years ago.

Answer 5

I'm definitely thinking US state of the art aircraft reverse engineered from captured alien technology.

Answer 6

looks like an optical illusion. or is it?

Answer 7

Bigfoot.  

Answer 8

The shadow of the clouds behind you were blocking the sun from hitting the smog.

Answer 9

It was an alien space craft that shoots rainbow colored smoke; you're trying to make something out of nothing.

Answer 10

Swamp gas.