CIA Director William Burns says that without aid, Ukraine "could lose on the battlefield by the end of 2024"

CIA Director William Burns acknowledged Thursday that without military assistance from the U.S., Ukraine could experience significant setbacks in its war with Russia.  

Ukrainians are "at a tough moment on the battlefield right now," Burns said during a Q&A session at the Bush Center Forum on Leadership in Dallas.

With supplemental assistance from the U.S., Burns said, Ukrainian forces "can hold their own on the battlefield in 2024 and continue to do damage with deeper strikes in Crimea...and against the Black Sea fleet."