49ers, Ravens square off in Super Bowl XLVII

San Francisco 49ers head coach Jim Harbaugh, right, and Baltimore Ravens head coach John Harbaugh look on during practice before the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)
February 3, 2013 9:47:51 PM PST