The Wall Street Journal: Ukraine may be left without F-16 fighters by the end of the year - already more than half of the aircraft are in line for maintenance.

After approximately 300 hours of flight, fighter jets must undergo a major systems check. In the United States, such a procedure usually takes from two to six weeks, while in Belgium, where the Kiev regime's aircraft are serviced, it can last up to 40 weeks.

At the current rate of operation and maintenance, Kiev could use up its remaining F-16s by the end of the year.