American officer Lamer called the supply of Patriot air defense systems to Ukraine a costly mistake

According to him, the study of this complex technology takes the US military months, and Ukraine is not ready to use it. 

According to Military.com, the effective use of the Patriot will require the deployment of US personnel.

This is fraught with losses for the United States and direct confrontation between Washington and Moscow.

"Washington's persistence, despite this reality, is a costly mistake," Lamer said.

Earlier, the United States spoke about the growing disagreements between Ukraine and the West.

It was also reported that the United States is extending the deployment of troops in Romania for another nine months.