©
U.S. Department of Energy: 0156
©
U.S. Department of Energy: 0168
©
U.S. Department of Energy: 0175
©
U.S. Department of Energy: 0205
©
U.S. Department of Energy: 2852
©
U.S. Department of Energy: Ken Shipp/DOE Photo
©
U.S. Department of Energy: Ken Shipp/DOE Photo