A high-resolution map from NASA's Shuttle Radar Topography Mission (SRTM), released yesterday, has provided the most telling visible evidence to date of a 112-mile (180-kilometer) wide, 3,000-foot (900-meter) deep impact crater, the result of a collision with a giant comet or asteroid on one of Earth's all-time worst days.
Sources:
"Dinosaur-Killer" Asteroid Crater Imaged for First Time
http://news.nationalgeographic.com/news/2003/03/03
http://news.nationalgeographic.com/news/2003/03/photogalleries/crater/images/primary/crater_composite.jpg
Shuttle Radar Topography Mission
http://www.jpl.nasa.gov/srtm/index.html
http://www.jpl.nasa.gov/srtm/mexico.htm
http://photojournal.jpl.nasa.gov/tiff/PIA03379.tif
http://photojournal.jpl.nasa.gov/tiff/PIA03380.tif
http://photojournal.jpl.nasa.gov/tiff/PIA03381.tif
Now that I look at it... they should have inserted the Special Forces team by boat.