Native American and environmentalist protesters celebrated Sunday the Obama administration's decision to halt construction of the Dakota Access oil pipeline near Standing Rock Sioux Reservation.

The Army Corps of Engineers denied an easement for the pipeline to cross Lake Oahe, a Missouri River reservoir, saying it would look for alternative routes for the nearly complete $3.7 billion project. However the length of the delay is unclear, especially given President-elect Donald Trump's previously expressed support for the pipeline.

Here & Now's Robin Young speaks with NPR's Nathan Rott (@NathanRott) about the latest developments and the possibilities for the pipeline project's future.