The end of the American century A retired Army colonel offers a scathing critique of America's "sense of entitlement," pointing to misguided oil consumption, politics, and strategies of our armed forces.9:06 a.m.
Andrew Bacevich: Professor of history and international relations at Boston University. His most recent book is "The Limits of Power: The End of American Exceptionalism."
The science of tornadoes A team of tornado researchers is currently roaming the Great Plains, in the middle of the most ambitious attempt ever to determine the origin, evolution, and structure of tornadoes. Their hope is to increase the accuracy of forecasts and warnings.10:06 a.m.
Joshua Wurman: President of the Center For Severe Weather Research. He's one of the lead researchers on the VORTEX2 project.
Bradley Smull: Associate program director in physical and dynamic meteorology at the National Science Foundation.