哪吒机器人提醒：
提醒：USA News, Latest US News, Top America News | World News - Times of India
【标题】Congress OKs bill to update US air control system
【摘要】a bill to speed the update the us air traffic control system from radar to one based on gps technology and to open us skies to unmanned drone flights within four years received final congressional approval monday.
... (02-07 20:01)
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