美国 · 综合新闻 · PBS NewsHour
Why a problem on the ground can affect flights thousands of miles away among other issues
详细摘要
Michael McCormick, a former airspace manager with the Federal Aviation Administration, said it could take days for airlines — many of which had to divert flights — to resume normal operations after officials lifted the grounding order.
MarketNews 仅展示媒体发布的标题和摘要，全文请在出版方网站阅读。 (www.pbs.org)
