Cause of the collapse As part of MPR's coverage of the I-35W bridge, Midday features a special report on the National Transportation Safety Board's investigation of the cause of the collapse.11:00 a.m.
Guests
Roberto Ballarini: Professor and head of the Department of Civil Engineering at the University of Minnesota.
The issue of race in presidential politics Juan Williams, journalist and Pulitzer Prize-winning author of the nonfiction bestseller "Eyes on the Prize: America's Civil Rights Years, 1954-1965," discusses the role race is playing in the 2008 presidential election.12:00 p.m.
Guests
Juan Williams: NPR senior correspondent, former White House reporter for the Washington Post and author of the nonfiction bestseller, "Eyes on the Prize: America's Civil Rights Years, 1954-1965"