Excavation equipment is used to search for an oil leak close to where the TransCanada Corp's Keystone oil pipeline runs through northern St. Charles County off of Highway C, Thursday, Feb. 7, 2019, near St. Charles, Mo. The source of the oil leak has not yet been identified but the Keystone oil pipeline has been shut and the Missouri Department of Natural Resources official said the the release is stopped. (David Carson/St. Louis Post-Dispatch via AP)
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