Greetings, my dear friends and fellow detectives! Today, we're going to take a trip down memory lane and talk about the top ten airlines that, unfortunately, do not exist anymore. It's a sad topic, but as a detective, it's my job to shed some light on the reasons why these airlines disappeared. Let's dive in, shall we?

1. Pan Am: Pan American Airways, or Pan Am, was one of the most iconic airlines in the world. It was the first airline to offer transatlantic flights and had a fleet of luxurious planes. Unfortunately, the airline's financial struggles and a terrorist attack in 1988 led to its eventual bankruptcy in 1991.

2. TWA: Trans World Airlines, or TWA, was another iconic airline that operated from 1930 to 2001. The airline was known for its international routes and its iconic logo. TWA's financial struggles and the September 11th terrorist attacks ultimately led to its demise.

3. Eastern Air Lines: Eastern Air Lines was a major U.S. airline that operated from 1926 to 1991. The airline faced numerous financial struggles throughout its history, and a 1989 strike by its employees was the final nail in the coffin for Eastern.

4. Braniff International Airways: Braniff International Airways was a U.S. airline that operated from 1928 to 1982. The airline was known for its bold and colorful branding, but it ultimately couldn't compete with larger airlines and declared bankruptcy in 1982.

5. Swissair: Swissair was the national airline of Switzerland and operated from 1931 to 2002. The airline faced numerous financial struggles throughout the 1990s, and the aftermath of the September 11th terrorist attacks was the final blow that led to its bankruptcy in 2002.

6. Ansett Australia: Ansett Australia was one of the major airlines in Australia and operated from 1935 to 2001. The airline faced financial struggles throughout the 1990s, and the collapse of Air New Zealand, which owned a large stake in Ansett, ultimately led to its bankruptcy.

7. Varig: Varig was the flag carrier of Brazil and operated from 1927 to 2006. The airline faced numerous financial struggles throughout its history and filed for bankruptcy in 2005.

8. Sabena: Sabena was the national airline of Belgium and operated from 1923 to 2001. The airline faced financial struggles throughout the 1990s and was ultimately liquidated after the September 11th terrorist attacks.

9. Mexicana de Aviación: Mexicana de Aviación was the national airline of Mexico and operated from 1921 to 2010. The airline faced numerous financial struggles throughout its history and filed for bankruptcy in 2010.

10. Aloha Airlines: Aloha Airlines was a U.S. airline that operated from 1946 to 2008. The airline was based in Hawaii and faced financial struggles throughout the 2000s. Aloha Airlines ultimately filed for bankruptcy in 2008 and ceased all operations.

As you can see, the airline industry can be a very tough business. From financial struggles to terrorist attacks, there are many factors that can lead to the demise of an airline. It's important to remember these airlines and the impact they had on the aviation industry. Rest in peace, Pan Am, TWA, and all the other airlines that are no longer with us.