Describe symbolism in The Tears of Autumn by Charles McCarry

Mexico City represents the crossroads for political. personal, and cultural narratives in the book. The crossroads for airline flights among Moscow, Beijing, and Havana, Mexico City is where Lee Harvey Oswald is recruited to kill John F. Kennedy. American agent Don Wolfe is in the Mexican capital when Cuban terrorist Manuel Ruiz meets Oswald at the Alameda Park. Both the Soviet and Cuban embassies refuse visas to the former defector to the USSR. Ruiz travels on to Hanoi, after being photographed by Mexican airport security.