Today, on the Fourth of July, we mark the original signing of the Declaration of Independence, and the birth of our nation -- which is 233 years old. The flag may be the United States' most popular patriotic image. The flag has been front and center throughout President Obama's campaign and, to this point, his presidency. Scroll through this gallery for photos, taken by Globe columnist Derrick Z. Jackson, of the American flag at Obama events.

University of New Hampshire

February 2007