Article Photos: Oklahoma tornadoes: Two upgraded from EF-3 to EF-4 3/27

A gasoline tank that was blown from it's concrete enclosure into Lake Thunderbird is removed 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