Old L.A. streetcarApril 9, 1947: An extremely strong tornado levels the towns of Glazer and Higgins in the Texas Panhandle, jumping the border to also partly destroy Woodward, Oklahoma. The tornado outbreak continued into the state of Kansas, killing 181 people in the three states.

April 9, 1947: Nine corporations are indicted for violating antitrust laws. Firestone, Mack Truck, GM, Standard Oil of California and others allegedly conspired to shut down streetcar lines in Los Angeles (at right) and other U.S. cities, replacing them with buses that were made or fueled with their products. A jury convicts them on one of the two charges and imposes token fines. Today, cyberspace is overrun with arguments for and against the existence of a conspiracy.

April 9, 2010: Eleven days before one of the worst oil spills in history, a BP lobbyist tells the U.S. Congress that BP's Deepwater Horizon well has earned its "categorical exclusion" from environmental review.

Photo: Nick.Fisher/Flickr

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