在周五因维护升级导致通信瘫痪、空中交通停飞逾4小时后，运行正在恢复，但航班延误和取消仍在持续。
Flight Delays and Cancellations Persist as Air Traffic System Recovers Operations are returning to normal after air traffic was shut down for more than 4 hours on Friday following a maintenance upgrade that crippled communications.
周日，美国上空的空中交通运行持续好转，此前周五几乎所有航班停飞逾4小时。尽管如此，系统各处仍存在中断，许多航班取消或延误。
Air traffic operations over the United States continued to improve on Sunday after nearly all flights were grounded for more than 4 hours on Friday. Still, disruptions remained across the system with many flights canceled or delayed.
航空分析公司Cirium的数据显示，周日上午近90%的航班在计划起飞时间14分钟内起飞。但约5%的航班——超过1300个航次——已被取消，高于正常水平，显示全国性航班冻结的影响仍在继续。
Nearly 90 percent of all flights left within 14 minutes of their scheduled departure time on Sunday morning, according to Cirium, an aviation analytics company. But some 5 percent of flights — more than 1,300 trips — had already been canceled, higher than a typical day, showing the continuing effects of the nationwide flight freeze.
中断发生在主要枢纽——从佐治亚州的哈茨菲尔德-杰克逊亚特兰大国际机场到得克萨斯州的达拉斯-沃斯堡国际机场——以及凤凰城和费城的机场。
Disruptions have occurred at major hubs — from Hartsfield-Jackson Atlanta International Airport in Georgia to Dallas Fort Worth International Airport in Texas — and at airports in Phoenix and Philadelphia.
这些中断导致大学体育比赛推迟，职业篮球队滞留。乘客在机场过夜，争相改签航班；一些人干脆取消行程。
The disruptions postponed college sports games and stranded professional basketball teams. Passengers slept overnight in airports and competed to rebook their flights; some canceled their trips entirely.
这一拥堵是美国空中交通系统脆弱性的最新例证，该系统正面临双重危机：空管人员短缺和基础设施陈旧。
The logjam is the latest example of the vulnerabilities in the American air traffic system, which is facing twin crises: a shortage of air traffic controllers and an outdated infrastructure.
官员们认定，是一次系统升级导致了周五停飞的根本原因。承包商L3 Harris在将铜线升级为光纤电缆时，一台路由器用数据请求使系统过载，从而中断了通信。
It was an upgrade to the system that officials have identified as the root cause of the problems that led to the shutdown on Friday. As the contractor L3 Harris was upgrading copper wires to fiber-optic cables, a router overloaded the system with data requests, disrupting communications.