Actually it was 2 decades ago when it first happened

来源: Lvtotravel 于 2006-08-07 15:37:37 [] [旧帖] [给我悄悄话] 阅读数 : (272 bytes)
本帖于 2006-08-09 20:46:27 时间, 由普通用户 阿姗 编辑

over the years there were on/off incidents. Hence it does have safety issue - too close to Mexican borders.

http://www.nps.gov/foda/adhi/adhi4i.htm

NPS site gave a brief account of the first incidents.

The situation went on for several years.

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