TOP 10 FASTEST AIRCRAFT IN THE WORLD !!!

TOP 10 FASTEST AIRCRAFT IN THE WORLD
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Every air force of any nation in the world has the need for speed. You have to fly faster than anything that may enter your country’s airspace to be able to intercept possible attack of any sort. Time is of the essence and speed is a crucial element of that. Ever since the development of jet engine in the mid-20th century, aircraft engineers are on the race to build the fastest most sophisticated flying machine. Some of the greatest gravity-defying machines over the last century are as follows.
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10) Sukhoi Su-27
9) F-111 Aardvark
8) McDonnell Douglas F-15 Eagle
7) Mikoyan MiG-31
6) XB-70 Valkyrie
5) Bell X-2 Starbuster
4) Mikoyan MiG-25
3) Lockheed YF-12
2) SR-71 Blackbird
1) North American X-15