It’s a known fact that the USA is home to some of the world’s most famous wedding designers. Vera Wang, Carolina Herrera and Zac Posen have become household names, dressing everyone from Hollywood starlets to Middle Easter royalty. In celebration of Independence Day, we have scouted out seven spectacular USA gowns that you’ve probably never seen before, proving that it’s not just the Insta-famous dresses that are worthy of our attention. Happy Fourth of July! 1. Christian Siriano Spring 2011 Wh