Washington could rely on ship-to-air and air-to-air missiles, but they would be less effective against low-flying craft.
"We're used to low-flying jets around here, " said George Pilkington, who saw the jet fly over his truck.
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Tall buildings pose an obvious danger to low-flying aircraft, but here too there are strict rules to minimise pilots' risk.
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Under safety regulations, tall buildings must have navigation lights on top to make them visible to low-flying aircraft, he said.
They jump over walls, leap tall buildings in a single inhuman bound, and they can even attack a low-flying hang glider!
As a massive security operation swung into operation, the Federal Aviation Administration barred low-flying aircraft from within 3.5 miles (5.6km) of the site.
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An aircraft pilot has said he is "seriously concerned" for the safety of low-flying aircraft if a wind farm is built near Bristol.
Neighbors undoubtedly heard the low-flying helicopters, the sound of one crashing, and the sporadic explosions and gunfire that ensued, but nobody came outside.
It follows claims that low-flying jets on a training exercise recently led to mass panic, with kittiwake chicks falling into the sea and drowning.
It was reported that a low-flying jets taking part in training over the Farne Islands on Tuesday led to mass panic among thousands of nesting kittiwakes.
All three mountains offer floodlit night skiing on a portion of their runs which, after dark, resemble low-flying spaceships suspended high above the chocolate-orange glow of metro Vancouver.
That low-flying helicopter crisscrossing the skies over the San Francisco Bay Area for the next three days is gathering data on background radiation levels, according to the National Nuclear Security Administration.
In addition, the government banned helicopter tours after Peru's Institute of Natural Resources found low-flying aircrafts to be contributing to the disappearance of a rare species of orchid and the Andean Condor.
The Syrian military denied there was any weapons convoy and said low-flying Israeli jets had crossed into their country over the Israeli-occupied Golan Heights to bomb a scientific research center near Damascus.
Aaron Jesse, 47, said he had left work early for a round with friends at Westlake Golf Course and saw the low-flying plane hit a tree, spin around 180 degrees and land surprisingly gently.
The Army needs a better way for its low-flying rotorcraft to cope with such missiles, which are growing more agile and precise even as they become available around the world to any malcontent with enough money.
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Many of the affected areas include rich and sprawling suburbs east of Tampa Bay, where residents do not like to see their playgrounds, lakes and even their children doused with spray in the wake of low-flying aircraft.
In a star-studded hearing of the Transport Committee on Monday (at 4.05pm), Transport Secretary Patrick McLoughlin and Boris Johnson, the Mayor of London, will be quizzed about the various alternatives for expanding London's airport capacity...beware of low-flying arguments.
"I haven't been able to detect any correlation between low-cost carriers and enhanced risks from flying, " he said.
They are understood to be drawing up creative plans ranging from cheap and basic warehouses for low-cost carriers such as easyJet to luxurious lounges aimed at winning the hearts of frequent-flying businessmen.
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They are most effective when fired at aircraft flying at low altitudes, as at take-off or landing.
"Low cost airlines have given people the bug for flying - people who weren't flying before, " says David Kaminski-Morrow, air transport editor at industry magazine Flight International.
Flying, especially on the short breaks pioneered by low-cost carriers such as easyJet, is hugely popular.
His low-cost airline, Virgin America, celebrated its first year of flying in August, but Alaska Airlines recently filed a complaint that its rival is violating U.S. foreign ownership rules on domestic airlines and asked the U.S. Department of Transportation to conduct a public inquiry.
The study authors note that the majority of people flying out of Guinea, Liberia and Sierra Leone are traveling to other low- or middle-income countries.
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