Visitors and students line up to watch the U.S. President Barack Obama's speech at UNC-Chapel Hill, Tuesday, April 24, 2012. Barack Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

Police patrol the campus of UNC-Chapel Hill, Tuesday, April 24, 2012. President Barack Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans. [China.org.cn/Yang Xi]

U.S. President Barack Obama speaks on the subject of federal student loans at UNC-Chapel Hill, Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

U.S. President Barack Obama speaks on the subject of federal student loans at UNC-Chapel Hill, on Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

Visitors and students line up to watch U.S. President Barack Obama's speech at UNC-Chapel Hill, Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

The Daily Tar Heel, a local newspaper serving the UNC community, covered U.S. President Barack Obama's visit to UNC-Chapel Hill on its front page on Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

Visitors and students wait for U.S. President Barack Obama's speech at UNC-Chapel Hill, Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

Visitors and students line up to watch U.S. President Barack Obama's speech at UNC-Chapel Hill on Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]

Visitors and students go through security checks before watching U.S. President Barack Obama's speech at UNC-Chapel Hill, Tuesday, April 24, 2012. Obama visited UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans. [China.org.cn/Yang Xi]

Visitors and students wait for U.S. President Barack Obama's speech at UNC-Chapel Hill, Tuesday, April 24, 2012. Obama visits UNC-Chapel Hill on Tuesday as part of a nationwide tour to promote lower interest rates for student loans.[China.org.cn/Yang Xi]