美国或关闭部分领空

Group 1 - The core issue highlighted is the potential closure of "part of the airspace" in the U.S. due to ongoing government shutdown, which has exacerbated airport personnel shortages [1] - The U.S. Transportation Secretary, Sean Duffy, warned of large-scale flight delays and cancellations, stating that air traffic controllers are not available in necessary numbers to manage airspace [1] - The report mentions a recent tragic incident involving a UPS MD-11 cargo plane that crashed shortly after takeoff from Louisville International Airport, resulting in at least 3 fatalities and 11 injuries, with expectations of rising casualty numbers [1]