NTSB: Cracks found in 3 grounded Southwest planes - Tulsa World

... incident Friday, a 5-foot-long hole tore open in the passenger cabin roof ... Government calls on industry to repair aging oil, gas pipelines

Source: http://www.tulsaworld.com/site/articlepath.aspx?pg=business&articleid=20110405_45_E1_CUTLIN315684&subjectid=49

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