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
Colombia, Venezuela, and Ecuador square off over fighting the FARC guerillas. The Colombian conflict, regional tensions, and the role of shifting U.S. counternarcotics tactics.
- Michael Braun assistant administrator, chief of operations at the U.S. Drug Enforcement Administration
- Jose Miguel Vivanco Americas director, Human Rights Watch
- Col. John Cope (U.S. Army - Retired) senior research fellow, National Defense Univeristy's Institute for National Strategic Studies
- Juan Forero reporter, Washington Post
- Mark Schneider senior vice president and special adviser on Latin America, International Crisis Group.
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