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
Homeland Security Secretary Tom Ridge asked the nation’s governors to deploy the National Guard while U.S. troops prepare for a likely invasion of Iraq. A panel talks about this and other components of "Operation Liberty Shield," the decision to reinstate the code orange terrorism threat level, and the relationship between hostilities in Iraq and the threat of a terrorist attack here in the U.S.
- John Parachini policy analyst specializing in terrorism and weapons proliferation at RAND
- Skip Brandon former deputy assistant director for international terrorism at the FBI
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