But before the first 24 hours were out, and while the search-and-rescue operation was ongoing, the Coast Guard was eyeing the potential environmental impact of the explosion.
"We did have a Coast Guard helicopter crew fly for 60 miles up the shoreline there to see if they could spot any environmental impact and they weren't able to find anything, " he said, adding a Coast Guard boat surveying 15 miles south of the site also detected nothing.