Question to the 911 conspiracy theorists?

Okay 911 conspiracy theorists, explain this one to me if you can: This past weekend a tanker truck carrying 8600 gallons of unleaded gasoline crashed on the Oakland Bay bridge at 3:41am. Firefighers arrived 3:55am. By 4:02am the fire had MELTED THE STEEL BEAMS causing a collapse of the upper level. a href="http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/04/29/BAGVOPHQU46.DTL" rel="nofollow"http://www.sfgate.com/cgi-bin/article.cg…/a So how is it possible for 8600 gallons of unleaded gasoline burning for 21 minutes to melt steel even with firefighters using water to control the blaze, yet 24,000 gallons of jet fuel burning uncontrolled for nearly an hour can't melt the steel beams in the WTC causing it's collapse??? Was George W. Bush secretely behind the collapse of the Oakland Bay bridge too????