美國西雅圖國際機場星期五（8月10日）發生劫機事件，有一名29歲航空公司員工未經許可，擅自開走一架無載客的小型飛機，軍方一度出動F15戰機攔截，最終小型飛機墜毀。
被劫走的為地平線航空（Horizon Air）的一架龐巴迪Dash 8 Q400飛機，當地警方證實，飛機已經在西雅圖機場西南的一個小島上墜毀。機場的官方Twitter表示，一名航空公司職員，在未獲授權下，於機場劫走一班沒有乘客的飛機後起飛，並證實飛機已經墜毀，現時機場已經回復正常運作。
地平線航空隸屬的阿拉斯加航空集團亦發表聲明，指飛機於當地時間星期五晚上8時被劫走，暫時未知劫機者身份，但相信機上並無機員及乘客。
龐巴迪Q400為渦輪螺旋槳飛機，最多可載78人。
（網上片段截圖）
Some dude stole a plane from #Seatac (Allegedly), did a loop-the-loop, ALMOST crashed into #ChambersBay, then crossed in front of our party, chased by fighter jets and subsequently crashed. Weird times. pic.twitter.com/Ra4LcIhwfU
— bmbdgty (@drbmbdgty) 2018年8月11日
We are out here of area. Anybody know anything? Caution: strong language Video credit: Skylar Jacobson
Posted by Jon Tornquist on Friday, 10 August 2018
We've confirmed a Horizon Air Q400 that had an unauthorized takeoff from SeaTac around 8pm has gone down near Ketron Island in Pierce County, WA. We're working to confirm who was on board, we believe there were no guests or crew on board other than the person operating the plane.
— Alaska Airlines (@AlaskaAir) 2018年8月11日
An airline employee conducted an unauthorized takeoff without passengers at Sea-Tac; aircraft has crashed in south Puget Sound. Normal operations at Sea-Tac Airport have resumed.
— Sea-Tac Airport (@SeaTacAirport) 2018年8月11日