A pilot poses with a Sukhoi Su-25 aircraft during the second day of the Wonsan Friendship Air Festival in Wonsan in Sept. 2016. North Korea’s air force is out-of-date, according to experts.

A pilot poses with a Sukhoi Su-25 aircraft during the second day of the Wonsan Friendship Air Festival in Wonsan in Sept.  2016. North Korea’s air force is out-of-date, according to experts.