© 2006, © 1992 WGBH Educational Foundation. All rights reserved.
Adapted from NOVA: "In the Path of A Killer Volcano." A Production of The Documentary Guild in association with WGBH Boston for NOVA. Still images courtesy of University of Texas Libraries, The University of Texas at Austin, and U.S. Geological Survey. Stock footage courtesy of United States Air Force, PHIVOLCS, CBS, Associated Press Television News, ITN, ABS-CBN NEWS, and Chris Newhall.