COMMENTARY: Winona LaDuke: Happy anniversary, Minnesota: Largest inland oil spill in U.S. was in March 3, 1991

Most Minnesotans don't realize that we boast the largest inland oil spill in U.S. history. On March 3, 1991, the Line 3 pipeline ruptured near Grand Rapids, Minn., spilling over 1.7 million gallons of oil, much of which flowed into the Prairie Ri...