A federal investigator said Tuesday that a Boeing factory worker had been arrested for vandalizing one of them, and damage done to another helicopter was still being looked at.

• 一名联邦调查员20日称，已有一名该工厂工人涉嫌破坏其中一架直升机被拘捕，而另一直升机遭破坏案尚在调查中。