Was That Explosion Chemical or Nuclear? (IMAGE) DOE/Pacific Northwest National Laboratory Caption From left to right: Tim Johnson, Hunter Knox, and Harry Miley bring together different perspectives to better detect underground nuclear explosions. Credit Composite image by Shannon Colson | Pacific Northwest National Laboratory Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.