President Biden signed an executive order Wednesday canceling the permit that allowed the Keystone XL pipeline to cross Canada's border with the U.S.

The order puts a stop to the 1,200-mile pipeline meant to move oil from Canada to the Gulf of Mexico, which has been hotly contested by environmentalists as a contributor to climate change.

Here & Now's Tonya Mosley speaks with Ali Velshi, MSNBC anchor and economics correspondent, about the years-long controversy over the pipeline and what happens next.