Ukrainian military shares video of a US-made Bradley fighting vehicle defeating a Russian T-90M tank.
The Bradley's 25mm cannon proves effective against the advanced Russian tank.
Putin's claim of the T-90M being the "world's best tank" is called into question.
The Bradley IFV is shown to be a capable "tank killer".
The video highlights the effectiveness of Ukrainian forces against Russian armor.
Open-source analysts confirm the Bradley's involvement in the combat.
Ukrainian sources contradict Russian state media's downplaying of the incident
The US Department of Defense commends the Bradley IFV's effectiveness in the battlefield.
The T-90M's reputation as the "world's best tank" is put under scrutiny.