For the original quiz, go here.
1. Sioux City, Iowa. The airport's official name, Colonel Bud Day Field, honors George E. "Bud" Day, a Sioux City native and U.S. Air Force veteran of World War II, the Korean War, and the Vietnam War. Day is the most highly decorated U.S. military officer since General Douglas MacArthur. The airport, also known as Sioux Gateway Airport, was in the news lately because after 19 years its officials finally decided to stop fighting its FAA airport code: SUX. "If we can't beat 'em, we can make money off 'em," seems to be the general spirit.
2. Brasilia. As president of Brazil from 1956 to 1961, Juscelino Kubitschek de Olveira, whose mother was of Czech origin, oversaw the construction of the new capital city.
3. Toronto. Lester Bowles "Mike" Pearson was Canada's fourteenth prime minister, from 1963 to 1968.
4. Venice. The explorer Marco Polo (1254-1324) was born in Venice.
5. Warsaw. The airport in the Polish capital is named for the composer (1810-1849), who actually was born in Zelazowa Wola, in central Poland. He left his native country for Paris at age 20 and never returned.
6. Sydney. Charles Edward Kingsford-Smith (1897-1935) was an early Australian aviator.
7. Agana, Guam. This capital city's airport is named for Antonio Borja Won Pat (1908-1987), who was Guam's first delegate to the U.S. Congress.
8. Barrow, Alaska. Aviator Wiley Post and humorist Will Rogers died in an August 1935 plane crash near Point Barrow.
9. Gdańsk, Poland. The airport is named for the former Polish president (1990-1995) and co-founder of the Solidarity movement. The "W" on the the façade of the passenger terminal is adapted from Walesa's signature.
10. Oranjestad, Aruba. The airport is named for the current queen of the Netherlands (born 1938). The Caribbean island is in the Realm of the Kingdom of the Netherlands.
11. Beirut. Hariri, whose first name is also spelled Rafik or Rafiq, was Lebanon's prime minister from 1992 to 1998 and again from 2000 to 2004. He was assassinated in 2005.
12. Jedda, Saudi Arabia. King Abdulaziz (1876-1953) unified the kingdom of Saudi Arabia and was its first monarch.
13. Manila. Benigno "Ninoy" Aquino, Jr. (1932-1983), was a Philippine senator and opponent of President Ferdinand Marcos. He was assassinated at the airport that now bears his name.
14. Casablanca. Mohammed V was the sultan of Morocco from 1927 to 1953. He lived in exile from 1953 to 1955 and was the country's king from 1957 until his death in 1961.
15. Dar es Salaam. Julius Kambarage Nyerere (1922-1999) was Tanzania's first president (1964-1985).
16. Tirana, Albania. Agnes Gonxha Bojaxhiu (1910-1997), later known as Mother Teresa, was born in Albania. She founded the Missionaries of Charity and spent more than 40 years ministering to the sick and dying in Kolkata (Calcutta), India. Teresa won the Nobel Peace Prize in 1979 and was beatified by Pope John Paul II after her death.
17. Johannesburg. Oliver Reginald Tambo (1917-1993) was a leader of the South African anti-apartheid movement and a president of the African National Congress.
18. Guadalajara. Don Miguel Hidalgo y Costilla (1753-1811) was a Creole priest (Mexican born of Spanish parents); he is considered the father of Mexican independence from Spain.
19. Algiers. Houari Boumedienne was the nom de guerre of Mohamed Boukharouba (1932-1978), who fought in the war for Algerian independence from France and was Algeria's president from 1965 to 1978. He created his assumed name from the names of the patron saints of Oran (Sidi el Houari) and Tlemcen (Sidi Boumedienne).
20. Havana. José Julián Martí Pérez (1853-1895) was a leader of the Cuban struggle for independence from Spain. He was also a celebrated poet and writer.
21. Orange County, California. A nine-foot bronze statue of the Duke says "Hello, pilgrim" to everyone who enters the terminal. (See photo, above.)
22. Santiago, Chile. Merino Benítez (1888-1970) created the Chilean Air Force and founded LAN, Chile's national airline.
23. Kolkata (Calcutta). The airport's previous name was Dum Dum Airport; it was changed to honor the Bengali patriot Netaji Subhash Chandra Bose (1897-1945[?]).
24. Caracas, Venezuela. Simón José Antonio de la Santísima Trinidad Bolívar Palacios y Blanco, known as El Libertador, was born in Caracas in 1783 and died in Santa Maria, Colombia, in 1833. Together with José de San Martin, he led several independence movements in South America; the country of Bolivia is named after him.
25. Baltimore/Washington. This airport was renamed in 2005 to honor the late Supreme Court Justice Thurgood Marshall (1908-1993), a native of Baltimore.
Extra-credit answer: Friedman Memorial Airport is in Hailey, Idaho, the gateway to Sun Valley. It's named for a pioneer Jewish merchant and his family. Other than Ben Gurion Airport in Israel, I doubt there's another airport in the world that's named for a Jew.
And here's a bonus answer to a question I didn't pose: In 2002 Speke Airport became Liverpool John Lennon Airport, in honor of that city's most famous native son. John Russell noted my lapse--more of an intentional omission, really--in a comment.
John Lennon is far from the only airport name I left out of my quiz. There's Louis Armstrong Airport in New Orleans; "Pappy" Boyington Field (for the World War II flying ace) in Coeur d'Alene, Idaho; Antonio Carlos Jobim Airport (for the musician) in Rio. In Mexico and many Central and South American countries, just about every airport is named for someone (usually a military hero). European airports, on the other hand, are almost always named only for their cities. The exception is Greece, where many airports are named after gods and historical figures from antiquity: Aphrodite, Aristotle, Hippocrates. Alexander the Great--even, bizarrely, Ikaros (a k a Icarus).