Russia's most modern tank has been seen suffering a 'disco head' glitch that sends its turrets spinning out of control while on the battlefield under fire. The bizarre fault has struck the T-90 ...

Gherman got to showcase his app on "Shark Tank's" 16th episode in season 15. Da Vinci Eye aims to keep budding visual artists going and give those who gave up on their artistic aspirations too ...

It looks great, but in action the T-90M has a flaw not seen in earlier Russian tanks: even minor damage causes the turret to start spinning uncontrollably, making it incapable of further combat.