UAVs were used in search and rescue after hurricanes struck Louisiana and Texas in 2008. Predators, operating between 18,000–29,000 feet above sea level, performed search and rescue and damage assessment. Payloads carried were an optical sensor and a synthetic aperture radar. The latter can provide images through clouds, rain or fog, and in daytime or nighttime conditions, all in real-time. Photos taken before and after the storm are compared, and a computer highlights areas of damage.Micro UAVs, such as the Aeryon Scout, have been used to perform search and rescue activities on a smaller scale, such as the search for missing persons