Soldiers spread out an empty 3,000-gallon onion tank before folding it for storage after learning to purify water at the water utilities facility in San Lorenzo, Puerto Rico, May 31, 2014. Soldiers spread out an empty 3,000-gallon onion tank before folding it for storage after learning to purify water at the water utilities facility in San Lorenzo, Puerto Rico, May 31, 2014. SHARE: Download: Full Size (1.87 MB) Tags: Photo Essays Credit: VIRIN: 410712-O-ZYL85-272.jpg Photo Gallery