It’s that time of year again, the week when advertisers take to the airwaves, to hawk Independence Day deals like burger bargains, freedom furniture discounts, and “red, white, and shoe” sales for the Fourth of July, an all-American reflection of the country’s patriotic fervor. But on the eve of our most American holiday, a new study reveals that patriotism among Americans has declined since the aftermath of the Sept. 11, 2001 attacks that unified citizens around love of country.