Bioengineers are creating human body parts to replace organs and manage life-threatening diseases. How techniques like 3-D printing and stem cell research are driving medical advances and raising ethical questions
The fourth deadly attack in just over a week in Pakistan. An update on a suicide car bomb that killed dozens in a market in northwest Pakistan, and fears the Taliban and other militants will target areas once thought secure.
- Michael Krepon founding president of the Henry L. Stimson Center, Diplomat Scholar at the University of Virginia, and author of "Better Safe than Sorry: The Ironies of Living with the Bomb." (Stanford University Press, 2009)
- Selig Harrison director of the Asia Program at the Center for International Policy.
- Robert Grenier chair, ERG Partners - consulting for the intelligence and security industry; CIA station chief in Pakistan until 2002; director of the CIA's Counter Terrorism Center from 2005 - 2006.
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