An "unprecedented" US and Yemeni aerial campaign on the weekend in Yemen has killed more than 40 al-Qaeda militants in a bid to thwart attacks by the network's local affiliate, officials said.
Al-Qaeda in the Arabian Peninsula (AQAP) has been linked to a number of failed terror plots against the United States, and its leader recently appeared in a rare video in which he vowed to attack Western "crusaders" wherever they are.
