The T-90 is a third-generation Russian main battle tank developed from, and designed to replace the T-72. It uses a 125 mm 2A46 smoothbore main gun, the 1A45T fire-control system, an upgraded engine, and gunner's thermal sight. From Wikipedia
In a display of tactical ingenuity, the Bradley's crew targeted the tank's optics after running out of armor-piercing rounds, causing the tank to lose control and crash.