Crop dusterAug. 3, 1921: The first cropdusting by aircraft is carried out by John MacReady, who dusts a field near Troy, Ohio, with lead arsenate in an effort to kill caterpillars.

Aug. 3, 1979: Tensions between white and Vietnamese shrimpers boil over. In Seadrift, Texas, several Vietnamese fishing boats are burned, a house is firebombed, and a fight between the two groups results in the fatal stabbing of a white shrimper.

Aug. 3, 2006: Ken Weiss, Usha Lee McFarling and Rick Loomis conclude their five-part multimedia series “Altered Oceans” for the Los Angeles Times. Their reporting and images, which show the increasing toxic threat to the oceans, wins a 2007 Pulitzer Prize.

Photo: chaunceydavis818/Flickr

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.