Photos: 'I've never seen anything like this' driver says

A collapsed portion of the Interstate 35W bridge over the Mississippi River is seen Wednesday, Aug. 1, 2007, in Minneapolis. (AP Photo/Star Tribune, David Denney)

Smoke rises from the Interstate 35W bridge, which stretches between Minneapolis and St. Paul, after it collapsed Wednesday, Aug. 1, 2007, into the Mississippi River. (AP Photo/Pioneer Press, Scott Takushi/www.twincities.com)

Emergency workers and cars are seen on the Interstate 35W bridge after it collapsed, sending numerous vehicles into the Mississippi River, Wednesday, Aug. 1, 2007.  (AP Photo/Jacob Reynolds)

Vehicles are scattered along the broken remains of the Interstate 35W bridge, which stretches between Minneapolis and St. Paul, after it collapsed into the Mississippi River during evening rush hour Wednesday, Aug. 1, 2007, sending vehicles, tons of concrete and twisted metal crashing into the water. (AP Photo/The Star Tribune, Heather Munro)

Onlookers look at the remains of the Interstate 35W bridge, which stretches between Minneapolis and St. Paul, after it collapsed into the Mississippi River during evening rush hour Wednesday, Aug. 1, 2007. (AP Photo/The Star Tribune, Brian Peterson)

The Interstate 35W bridge is shown after it collapsed Wednesday, Aug. 1, 2007, in Minneapolis. (AP Photo/Star-Tribune, David Denny)

Emergency personel respond at scene of the Interstate 35W bridge in Minneapolis after it collapsed, sending numerous vehicles into the Mississippi River, Wednesday, Aug. 1, 2007. (AP Photo/Jacob Reynolds)

Collapsed sections of the Interstate 35W bridge lie in and next to the Mississippi River on Wednesday, Aug. 1, 2007, in Minneapolis. (AP Photo/Star Tribune, Brian Peterson)

Rescue workers gather on the Interstate 35W bridge, which stretches between Minneapolis and St. Paul, after it collapsed Wednesday, Aug. 1, 2007, into the Mississippi River during evening rush hour. (AP Photo/Pioneer Press, Scott Takushi/www.twincities.com)

A an unidentified bystander checks on a driver in a minivan on a section of the Interstate 35W freeway bridge after it collapsed Wednesday, Aug. 1, 2007, in Minneapolis. (AP Photo/The Star Tribune, Heather Munro)

A section of the I-35W bridge in Minneapolis rests on freight cars after collapsing Wednesday, Aug. 1, 2007. (AP Photo/Jim Mone)

An unidentified person, front, sits on the collapsed decking of the Interstate 35W bridge in Minneapolis, Wednesday, Aug. 1, 2007 (AP Photo/Star-Tribune, Bruce Bisping)

Emergency personnel transport an injured person after the collapse of the Interstate 35W bridge, which stretches between Minneapolis and St. Paul, Wednesday, Aug. 1, 2007. (AP Photo/The Star Tribune, David Brewster)

Fernando, front, and Shana Sifuentes along with others stand in Gold Medal Park in downtown Minneapolis to get a look at the collapsed Interstate 35W bridge over the Mississippi River on Wednesday, Aug. 1, 2007. (AP Photo/Pioneer Press, Ben Garvin/www.twincities.com)

Emergency personnel deliver an injured person from the Interstate 35W bridge collapse to the Hennepin County Medical Center Wednesday, Aug. 1, 2007, in Minneapolis. (AP Photo/Pioneer Press, Ben Garvin/www.twincities.com)

Damaged vehicles on a collapsed portion of the Interstate 35W bridge. (Duane Ditty/The New York Times)

This 2005 image provided by John Weeks III shows the I-35W bridge north of Minneapolis. (AP Photo/John Weeks III)