Global support for the "responsibility to protect" doctrine weakened after the UN-endorsed no-fly zone that helped topple Libya’s regime, and debate continues over the threshold for mounting armed hu…

Though shifts in demand and reduced production by some major producers have influenced oil prices, investor behavior is also increasing market volatility.

The Gulf of Mexico oil spill spotlights the growth of deepwater drilling and the challenges of balancing strong environmental regulation with efforts to expand U.S. domestic oil production.

Non-OPEC oil producers, which turn out most of the world’s oil, are operating near capacity.