1973 (9 Fire Year / 7 Metal 9-Year Cycle / 9 Fire 81-Year Cycle)

February 22- Following President Richard Nixon's visit to mainland China, the United States and the People's Republic of China agree to establish liaison offices.
[notable observation]

March 29- The last United States soldier leaves Vietnam.
[notable observation]

April 3- The first handheld cellular phone call is made.
[entertainment / communications / advertising]

April 4- The World Trade Center officially opens.
[notable observation]

April 17- Federal Express officially begins operations.
[entertainment / communications / advertising]

May 3- The Sears Tower in Chicago is finished.
[notable observation]

July 5- The BLEVE (Boiling Liquid Expanding Vapor Explosion) in Kingman, Arizona, following a propane fire. This explosion has become a classic incident, studied in fire department training programs worldwide.
[expansive / explosive]

October 6- Yom Kippur War, the largest Arab-Israeli conflict begins.
[expansive / explosive]

October 10- Spiro Agnew resigns as Vice President of the United States and then pleads no contest to charges of income tax evasion.
[illumination / exposure]

October 17- The Arab Oil Embargo against several countries which support Israel triggers the 1973 energy crisis.
[expansive]

November 11- Egypt and Israel sign a United States-sponsored cease-fire.
[fortunate outcomes]

November 29- 104 people are killed in a Taiyo department store fire in Kumamoto, Kyūshū, Japan.
[notable observation]

February 1- Fire in the Joelman Bank Building in São Paulo, Brazil; 188 die, 293 are injured.
[notable observation]