Mark Johnson describes precautions against radioactivity levels
Audio credit: Audio courtesy Doug Schneider, 91视频 Sea Grant College Program 
                           Filename: Amchitka-johnson-precaution.mp3 
                           Download a transcript of this audio. (WORD 32K) 

As a precaution, each researcher on the study wore small radiation monitoring devices that signaled if radiation levels exceeded safe limits. UAF Oceanographer Mark Johnson explains that Geiger counters also were used during the study to detect radiation.
Image credit:
                           Photo by Volkan Tuncer, UAF.
                           Filename: VT-IMG_0018.JPG 
				
