Commander: U.S. Underestimated in Iraq By CHRIS TOMLINSON .c The Associated Press BAGHDAD, Iraq (AP) - Before the capital fell, armchair generals painted gloomy scenarios of perilous street fighting and plenty of American dead in Baghdad. America could fight from the air, they said, but lacked the stomach for a fight on the ground. Wrong, insists the man who commanded the assault on Baghdad. Col. David Perkins, commander of the 2nd Brigade Combat Team of the 3rd Infantry Division, says the war showed that Americans can fight in any environment. ``We did desert, we did swampland, we did canals, we...