300×428 Figure 6. Photograph of the external surface of Pipe Segment A2 on the counter-clockwise side of rupture., in Pilot Grove, MO PEPL explosion, by John S. Quarterman, for SpectraBusters.org, 25 August 2008,
http://www.phmsa.dot.gov/pv_obj_cache/pv_obj_id_11F40E719B390ECD8C40151143A379EF2BC52E00/filename/Panhandle_Eastern_GT_MO_508_2008-08-25.pdf
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