Honestly I would have understood the reference in the title except that I heard this lousy joke recently.
A Rabbi From Spain, Just Before Passover, Alarmingly Telephones A Rabbi From Isreal, To Notify Him Of A Shortage Of Chrain (Horseradish). The Rabbi From Isreal Resassures Him Not To Worry, He Will Send The Needed Chrain To Spain. When The Rabbi From Spain Does Not Receive His Chrain, He Telephones The Rabbi In Isreal. The Rabbi From Isreal Says I Am Sorry To Inform You, We Have A Major Air Plane Strike In Isreal. Unfortunately At This Time, “THE CHRAIN FOR SPAIN IS MAINLY ON THE PLANE.”