Keystone Pipeline

Investigators looking into the Keystone pipeline oil spill in Kansas found problems in the manufacturing and installation of a pipe that burst last December. Owner TC Energy also knew that the specific piece of the pipeline had been warped for a decade. Plus: The unique role that Kansas City played in McDonald's becoming a fast food giant.

The Keystone was built with extra safety measures, yet it split open under run-of-the-mill pressure levels that less rigorously designed pipelines regularly withstand.

Hundreds of thousands of gallons of crude oil spilled out of the Keystone Pipeline in north-central Kansas, and cleaning it up will be especially difficult. Plus: Kansas nursing homes are facing allegations of neglect, even after receiving rewards for more thoughtful care.

Drone footage immediately following the spill showed the 588,000 gallons of oil turned Mill Creek black. Keystone pipeline owner TC Energy says the fly-zone is necessary for the "safety and security" of cleanup crews.

The Keystone pipeline failed again last week, dumping 14,000 barrels — or 588,000 gallons — of oil in northern Kansas. In the decade since it began operations, the crude oil pipeline’s Canadian owner, TC Energy, has paid just over $300,000 fines for the damages it's caused.