Human rights issues shade Obama's visits to Cuba and Argentina. Plus: Colombia faces peace deadline; Venezuela goes on a long holiday; and more.

With plenty still on the table for the Colombian government and FARC guerillas to resolve, both sides are now backing off the March 23 deadline.

Colombia’s former president on his objections to a deal, and his “vendetta” with his successor.

A new study shows narco-trafficking gangs are only part of the problem.

Who are the Bacrim and what do they mean for Colombia’s peace negotiations?