A new chief took over the US Border Patrol this month, and for the first time in 92 years, it isn't someone who rose through the ranks. Mark Morgan—a former FBI official who once specialized in intelligence and counterterrorism—has stepped in to lead the scandal-plagued group once described as "America's most out-of-control law enforcement agency." Predictably, Morgan's hiring has caused a stir among Border Patrol agents, who expected one of their own to take the helm.