Article Photos: Chesapeake converts Oklahoma vehicle fleet to run on natural gas

An employee at OEM Systems Inc. in Okarche works on a truck being converted to run on compressed natural gas in October 2009. <strong>The Oklahoman archives - David McDaniel</strong>

An employee at OEM Systems Inc. in Okarche works on a truck being converted to run on compressed natural gas in October 2009. The Oklahoman archives - David McDaniel