July 6, 2012 (15 images)

President Barack Obama holds Nathan Maxwell Johnson, 9 months, after holding a campaign rally at Dobbins Elementary School in Poland, Ohio on July 6, 2012. President Obama is on the second day of his, "Betting on America" bus tour through Ohio and Pennsylvania. UPI/Kevin Dietsch

Roger Waters performs in concert at Yankee Stadium in New York on July 6, 2012. UPI /Laura Cavanaugh

President Barack Obama speaks before signing HR 4348, which includes transportation and student loan interest rate bills in Washington, DC on July 6, 2012. The bill will put Americans to work repairing the nation's crumbling roads and bridges and will prevent student loan interest rates from doubling for more than 7 million students. UPI/Molly Riley/Pool

President Barack Obama wipes sweat from his face as he delivers remarks at a campaign on the campus of Carnegie Mellon University in Pittsburgh, Pennsylvania on July 6, 2012. President Obama is on the second day of his, "Betting on America" bus tour through Ohio and Pennsylvania. UPI/Kevin Dietsch