The false-color image above shows jet contrails in the skies above the mid-Atlantic coast on 1/26/2001. Check out this NASA photo of the sky taken on the ground at about the same time. Visit The Contrail Effect to find out how contrails can affect Earth's climate, and how this was investigated after 9/11.
Image:
image credit: National Oceanic and Atmospheric Administration/Department of Commerce; image source; larger image
