Why Don't We Hear Sonic Booms Anymore?

Answer

The reason we don't hear sonic booms anymore is because no one is breaking the sound barrier over land. Astronauts are trained to break the sound barrier only over water. The military is the only ones that are allowed to go that fast over land.
2 Additional Answers
The reason we don't hear sonic booms anymore is because only the American military is allowed to break the sound barrier over land. Even astronauts in training have to wait to boom until they are over water. You can find more information here: www.discovery.com
We do not hear sonic booms anymore because air speed is tightly regulated over land masses. In the US it is against regulation to fly past the speed of sound accept in designated military areas.
Q&A Related to "Why Don't We Hear Sonic Booms Anymore?"
Speed is regulated over land areas. I do remember sonic booms in my youth being heard very frequently. Recall also that the SST could only do super sonic while it was over the ocean
http://answers.yahoo.com/question/index?qid=200706...
Activity, both cargo and passenger, is down at Rickenbacker
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It's available from Git, but no-one seems to want pull it from its slow death by testing... Embed
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What the hell. i know im late on answering this but he had an lbum out last year and around the time u first asked this he had a single out that was topping the charts called Break-up
http://wiki.answers.com/Q/What_happened_to_Mario_B...
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