Two of the greatest names in weaponry design - Mikhail Kalashnikov and Mikhail Simonov - celebrate their 90th and 80th anniversaries, respectively. Kalashnikov is the father of the AK-47, an assault rifle that inspires admiration and fear in equal measure. It represents a precise and ruthless killer with a human name. Yet we know little about the man behind the brand. Mikhail Kalashnikov still works in the city where the manufacture of the AK-47 was launched 60 years ago. He is widely regarded as one of the most distinguished persons of the 20th century for his invention. Meanwhile, Mikhail Simonov was behind what are widely regarded as the best fighter aircraft ever produced, the Sukhoi SU-27 and the SU-30. Like his compatriot, his work has never stopped.