Was the T-34 tank design a reaction to foreign developments, a response combat experience or logical evolution of existing Soviet tanks? What was the most troublesome aspect the T-34's design during its development — the engine, armour, tracks or equipment? Did the T-34's designers in the Soviet Union have to worry about cost their tank? Peter Samsonov, author of a book «Designing the T-34: Genesis of the Revolutionary Soviet Tank», answers this and other questions of readers.