Moscow likely hoped a deal could be made, but it wasn’t. Instead, some of the aircraft ... of the Su-35 was partly due to delays in the PAK FA program, which the Su-57 was developed to meet.

On March 4, the FA-50 fighter jet with tail number 002 went missing during a tactical night operation in support of ground troops, according to the PAF. The wreckage of the ill-fated aircraft was ...