How do you open world of tanks?

How was the cobra attack helicopter used? What is the fastest police car? How can the nnpc achieve internal economies of scale? Is the FA-18 Hornet fighter jet a marine or navy jet? What is a compound word for time of no war that has the same vowel sound as in wheel? How many wheels in 747 aircraft? What are the french tanks called? Why was it hard for bombers to take off from aircraft carriers? What is the Aircraft Classification Number of the F-16? What are the different seats in an f14 for? How do you upgrade your soldiers in Travian? What is the definition of the term avantis? What is an airplane with two sets of wings called? When was the b-2 spirit first put into service? How many KC-10's are there? How much is 1 single MRAP worth? Why does my cub cadet LT1042 just click when I try to crank? What is tonlet armor? How much does a f-16 cost? What is the purpose of a brush guard?