They also said he had a history of mental instability, and was arrested after crossing a White House security barrier last summer.

他们还称该名男子曾一度精神不稳定，去年夏天因跨越白宫安全护栏而遭到逮捕。

We actually scored and weakened the front, so we collapsed it back and held the vehicle from crossing that imaginary barrier.

我们实际上得分并削弱了前部，所以我们将其向后折叠并阻止车辆穿过那个假想的障碍。