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Mr. Schwall's exit comes after Tesla said Friday that its engineering chief, Doug Field, was taking a leave of absence to recharge and spend time with his family. Mr. Field is stepping away from the company for several weeks, according to people familiar with the matter. One person described the absence as a "six-week sabbatical" while Tesla declined to say when he would come back. "He has not left Tesla," a company spokesman said. Mr. Field, a key leader at the auto maker since joining in 2013 from Apple Inc., oversees the engineering of Tesla's vehicles, and last year he was also given oversight of production to better align those efforts.

A key leader of the terror group Al Qaeda in the Arabian Peninsula (AQAP) was killed in a U.S. airstrike in Yemen on Sunday, the Pentagon said. Abu Ahmed Al Awlaqi had led operations for the group in the Shabwa province. He also planned external attacks and coordinated the group's movement of weapons and explosives, authorities said. The death of the leader, according to Navy Captain Jeff Davis, was the result of a monthslong campaign designed to kill leaders of the group and other Yemeni operatives. Seven other members of the group were also killed in Sunday's strike, Davis said.