9/11事件25周年已经过去。尽管其影响仍在持续，但运输安全管理局（TSA）在其《地平线25战略》中提出的近期提案表明，更多变化即将到来。尚待观察的是，这些变化能否保障国家空域安全。
The 25th anniversary of 9/11 is now behind us. Though the effects continue, recent proposals by the Transportation Security Administration (TSA), described in its Horizon 25 Strategy, suggest that more changes are coming. What remains to be seen is whether such changes will keep the nation’s air space safe.