An apparent coup in Yemen led its president and his cabinet to resign on Thursday.
Could this mean trouble for the US?
The now-former President Hadi was seen as a partner in combatting terrorist threats from the likes of Al Qaeda in the Arabian Peninsula; that group claimed responsibility for the attack on magazine Charlie Hebdo in France.
Charles Schmitz, scholar with the Middle East Institute, past-president of the American Institute for Yemeni Studies and geography professor at Towson University, explains what the power vacuum means for stability in the Middle East and America's own counterterrorism efforts in the region.