The mayor of one of the largest cities in Poland was fatally stabbed on stage during a charity event in Warsaw. Video shows the alleged attacker, who reports say is a 27-year-old man with a criminal record, approaching the mayor on the stage. Pawel Adamowicz, 53, has been the mayor of Gdansk for 20 years. He was rushed to the hospital in critical condition and later died. InsideEdition.com's Mara Montalbano (https://twitter.com/MaraMontalbano) has more.