Why information about Flights 77 and 93 did not reach NORAD in a timely fashion is less clear.

为什么77号和93号航班的情报没有被及时地传到NORAD的原因更不清楚。

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Norad co-ordinates with Santa's elf launch staff to confirm his launch time, but from that point on, Santa calls the shots. We just track him.

北美防空司令部和保障圣诞老人出发的精灵小组深度合作，以此确定他的出发时间，但是从那一刻开始，圣诞老人说了算，我们只能追踪他。

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Updates to the site are made every five minutes and the so-called "NORAD Tracks Santa" program has German, Spanish, French, Italian, Japanese and English links.

此网站每5分钟更新一次，这个所谓的“北美防空联合司令部追踪圣诞老人”项目有德语，西班牙语，法语，意大利语，日语和英语的链接。

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The NORAD commander said the Air Force could have stopped the planes if notified immediately.

CNN: 9/11 recordings chronicle confusion, delay

In past years, NORAD partnered with Google to help track Santa using Google Maps and Google Earth.

FORBES: NORAD Partners with Microsoft To Help Kids Track Santa

The official confirmed that the FAA's request to NORAD for U.S. military involvement came after the plane passed Minneapolis.

CNN: Pilots of wayward flight talk to NTSB