Article Photos: Oklahoma tornadoes: At least six of Mondays classified at EF-3 23/44

A salvage diver attaches a harness to a gasoline tank that was blown from it's concrete enclosure into Lake Thunderbird on Wednesday, May 12, 2010, in Norman, Okla.   The tank at the Marina on East Alameda landed upright and did not spill its contents into the lake.  Photo by Steve Sisney, The Oklahoman