AP Photo/Efrem Lukatsky
- A Ukrainian F-16 crashed on Monday, killing a top pilot, according to the Ukrainian military.
- The crash occurred during a massive Russian attack, which Ukraine's F-16s helped to defend against.
- It marks Kyiv's first loss of the US-made aircraft just weeks after they arrived in the country.
A Ukrainian F-16 fighter jet crashed on Monday, killing a top pilot in what appears to mark Kyiv's first loss of the American-made aircraft.
It is still unclear what led to the crash, which occurred just weeks after Ukraine received its first batch of F-16s from NATO.