By Ari Rabinovitch EILAT, Israel (Reuters) – A gust of air ruffled her white wedding dress before Hagar Cohen dived into the Red Sea, high heels sparkling in the sun as she disappeared beneath the waves. Minutes later the 33-year-old Israeli diving instructor, moonlighting as a model, was posing on a sunken missile ship 20 m (60 feet) below the surface of the Gulf of Eilat – for an underwater photo competition. Italian photographer Giordano Cipriani shot Cohen for about 30 minutes, directing her in sign language as the wedding gown floated freely about her as it never would on land. …