FILE – In this June 15, 2010, file photo, from left, ExxonMobil Chairman and CEO Rex Tillerson, Chevron Chairman and CEO John Watson, ConocoPhillips CEO James Mulva, Shell Oil President Marvin Odum, and BP America chairman and president Lamar McKay,
FILE – In this June 15, 2010, file photo, from left, ExxonMobil Chairman and CEO Rex Tillerson, Chevron Chairman and CEO John Watson, ConocoPhillips CEO James Mulva, Shell Oil President Marvin Odum, and BP America chairman and president Lamar McKay, are sworn in on Capitol Hill in Washington, prior to testifying before the House Energy and Environment subcommittee hearing on oil drilling. Houston is returning to its roots as an oil town to confront the immediate and long-term crisis created by Hurricane Harvey, tapping former Shell president Odum as its recovery officer. (AP Photo/Haraz N. Ghanbari, File)