My The Caucasian Knot comments on yesterday's arrival of an Azerbaijani passenger plane flying directly between Baku and Yerevan. Carrying the American, Russian and French co-chairs charged with the task of mediating between Armenia and Azerbaijan in an attempt to find a solution to the Nagorno Karabakh, such flights have only been possible since late 2006 — except for one time in the middle of the war between the two countries when Azerbaijani mafia bosses visited Armenia to pay their last respects to a local mobster killed in a Moscow prison.