国土安全部长马克韦恩·马林和交通部长肖恩·达菲即将在白宫发表讲话。
Markwayne Mullin, the secretary of homeland security, and Transportation Secretary Sean Duffy are about to speak at the White House.
马林早些时候将此事归咎于一次电信中断，但表示官员们并不清楚中断的原因。
Mr. Mullin blamed a telecommunication outage earlier but said officials did not know its cause.