A physical explosion of a steel structural vertical tank, which stores 20 tons sulfuric acid of a 98% consistency, occurs at an industry zone in Hukou County, east China's Jiangxi Province, at around 13:00 p.m., December 5, 2011. The sulfuric leakage was under control at 15:30 p.m.. No casualties are reported. [CNS Photo/Liu Desheng]