Andropov gave a speech.  A KGB official passed him a note,

"Someone wants to kill you."  He continued his speech undisturbed. 

A little later, the KGB official whispered in Andropov's ear, "We

just got information that the   assassin is in this room."  "Andropov

said, "It must be that man in the third row, second from left."  Two

KGB officials seized him and found he had a gun.  Amazed, they asked

Andropov how he recognized the would-be   assassin.  "As Lenin said,"

he replied" the enemies of the revolution never sleep!"