In the autumn of 1965, on a 640-acre parcel near the tiny Ozarks community of Strickler, ground was broken on a secret nuclear fission energy test reactor operated by the Atomic Energy Commission and a consortium of 17 southern electric utilities.

After just four years, the Southwest Experimental Fast Oxide Reactor went dark. It was acquired a few years later by the big university up the road 20 miles—totally decommissioned. University scientists hoped to use it for nuclear research, but the program failed to launch. The site remained sealed. Now the U.S. Department of Energy has offered money to help tear it down.

But first media — as well as hundreds of curious locals — were briefly allowed inside.

University of Arkansas

The historic Southwest Experimental Fast Oxide Reactor, referred to as SEFOR, located 20 miles southwest of Fayetteville, Arkansas will finally be dismantled, and some nearby residents are wondering what might leak out.