motorman filling in during a strike lead to a subway crash in Flatbush. The Malbone Street Wreck kills 97 people heading home from work and injures a hundred more. Okeh Records in business. Selwyn Theatre opens. 1919 February: City records 30,000 deaths from the Spanish flu. September 10: US Army 1st Division returns from war. New School for Social Research founded. Daily News begins publication. Algonquin Round Table active. 135th Street YMCA opens. 1920s 1920 September 16: Wall Street bombing kills 38 at "the precise center, geographical as well as metaphorical, of financial America and even of the financial world". Anarchists were suspected (Sacco and Vanzetti had been indicted just days before) but no one was ever charged with the crime. Apollo Theatre (42nd Street) opens. Gotham Book Mart in business. Population: 5,620,048. 1921 Port of New York Authority established. Council on Foreign Relations headquartered in city. May 3: First use of "Big Apple" as a nickname for the city appeared in a New York Morning Telegraph article by John J. Fitz Gerald. October 1: 833 AM became the 1st radio broadcast station in the city to signed on the air, under the call letters WJZ (now WABC (AM) 770). 1922 February 22: WOR (AM) 833 (now 710) signed on the air for the first time. March 2: WEAF 660 AM (now WFAN) signed on the air for the first time. September: Straw Hat Riot. Brooklyn Technical High School established. Roseland Ballroom built. 1923 Museum of the City of New York incorporated. Cotton Club (nightclub) and Barneys clothier in business. Duke Ellington Orchestra active. New York Yankees won their 1st World Series championship. American Academy of Arts and Letters building and Mecca Temple constructed. 1924 February 12: Premiere of Gershwin's Rhapsody in Blue. WNYC radio begins broadcasting. Pierpont Morgan Library established. New York Daily Mirror and New York Evening Graphic newspapers begin publication. Saks Fifth Avenue shop and Simon & Schuster publisher in business. Macy's Thanksgiving Day Parade begins. September 20: 920 AM signed on the air for the first time, under the call letters WAHG (now WCBS (AM) 880). 1925 February 6: WMCA 570 AM signed on the air for the first time. May: Air conditioning installed in the Rivoli cinema. The New Yorker magazine begins publication. Tannen's Magic Shop in business. New York Giants football team (founded by original owner Tim Mara) was one of the five teams