The US wants to send a more modern M1A2 version of the Abrams tanks to Ukraine.

This version of the tank has more sophisticated optics and control systems than the old version of the US A1.

The M1A2 version helps crews quickly track friendly vehicles, identify enemy positions and engage artillery fire. According to one source, the 31 Abrams tanks promised to Ukraine by the US government will be delivered without classified armor, including depleted uranium.