GPS 衛星要掉下來囉

From CNN.com
A new report says the GPS may not be running so smoothly as soon as next year. That's because some of those 24 satellites are in danger of failing. For you and for me, disruption to GPS might be a litter frustrating. We might be late getting to a friend's house. But as Elaine Quijano explains, for the military, which created and still uses them, the consequences could be more severe.

From cars to emergency call centers, the Global Positioning System has transformed the way Americans live and work. A report by the Government Accountability Office says some military and civilian users of GPS could be adversely affected unless the Air Force, which maintains the system, gets new replacement satellites soon.

Some of the satellites on orbit have been up there since 1992. They have lived well beyond their design life. It's everyone's guess as to when the satellites fail.

Exports say for most people, a failure would have no discernible impact on, say, getting directions to the local coffee shop. But military operations need accuracy down to centimeters. Congressman John Tierney, who sits on the House Oversight Committee, says that could affect national security.

上次才看到去修哈雷望遠鏡，沒想到這麼快又得修理GPS衛星了。只要提到這會危及到 national security，就好像我們會提到兩岸關係一樣！

Might 和 may；could 和 would 有沒有一樣呢？可以替換嗎？

＂as to＂又是關於。regard （關於）的筆記在這篇文：http://bento99.blogspot.com/2009/05/regard.html