A former US Air Force pilot Dale Zelko and Zoltan Dani, the former commander of a Yugoslav anti-aircraft rocket unit, met face-to-face in Dani’s kitchen in Serbia after years of engaging in an unlikely correspondence. During the Kosovo War of 1999, Zelko's F 117 'stealth fighter' was shot by Dani, whose unit at the time was low on morale and resources.
I don’t quite get it.. why are they unlikely friends?