Authorities in the United Kingdom have arrested more than 20 people in an alleged terror plot, saying the suspects had planned to cause mid-air explosions on planes using bombs created on-board. Join guest host Joe Palca in this hour of Science Friday for the latest news on the plot, and what authorities are learning about the bomb-making materials.  

Plus, how our bodies cope with the summer heat. We'll look at how the heat affects us, and what scientists are learning about extreme heat by studying soldiers.

 Call in with your questions and comments at 1-800-989-8255 (2-3 Eastern). Teachers, find more information about using Science Friday as a classroom resource in the Kids' Connection.

Guests:
Paul DesJardin
Assistant Professor, Mechanical and Aerospace Engineering
State University of New York  at Buffalo
Buffalo, New York

Michael Barr  
Director of USC Aviation Safety and Security Programs
University of Southern California
Los Angeles, California

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Michael Sawka
Chief, Thermal & Mountain Medicine Division  
U.S. Army Research Institute of Environmental Medicine  
Natick, Masachusetts

Larry Sonna
Assistant Professor, Division of Pulmonary and Critical Care Medicine
University of Maryland
Baltimore, Maryland

Larry Kalkstein  
President, Applied Climatologists Incorporated
San Marco, Florida

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This segment produced by Annette Heist