Twenty-three suspected Al-Qaeda members escaped from a Yemen prison in 2006.
The escape is notable because the escapers included several individuals imprisoned for their participation in the USS Cole bombing

USS Cole bombing

The USS Cole Bombing, or the USS Cole Incident, was a suicide attack against the United States Navy destroyer on October 12, 2000 while it was harbored and refueled in the Yemeni port of Aden. Seventeen American sailors were killed, and 39 were injured...

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The escape is notable because
Gaber Al-Bana’a was believed to be an American citizen, who traveled to an Afghan training camp

Afghan training camp

An Afghan training camp is a camp or facility used for militant training located in pre-2002 Afghanistan. At the time of the September 11, 2001 attacks, Indian intelligence officials estimated that there were over 120 training camps operating in Afghanistan and Pakistan, run by a variety of...

 with some friends who became known as the Lackawanna Six or Buffalo Six, when they were rounded up as a "sleeper cell".

The prisoners escaped through a 140 metre tunnel.

Escapees

According to the Yemen Times

Yemen Times

The Yemen Times is unified Yemen's first and most widely-read independent English-language newspaper. The paper is published twice-weekly and has its own printing press, advertising associates and news service....

the escapees were:

1. Yaser Naser Al-Homikani
2. Mohammed Sa’eed Al-Omda
3. Fawzi Mohammed Al-Wajeh
4. Zakria Hasen Al-Baihani
5. Abudlrahman Ahmed Basora
6. Abdullah Ahmed Al-Remi
7. Fawaz Yahya Al-Rabe ai
8. Hizam Saleh Mugli
9. Gamal Mohammed Al-Badwi
10. Zakria Hasen Al-Baihani
11. Abdulrahman Ahmed Basurah
12. Ibrahim Mohammed Al-Hoidi
13. Ibrahim Mohammed Al-Mukri
14. Aref Saleh Mugli
15. Shafik Ahmed Zaid
16. Gaber Al-Bana’a
17. Hamza Salem Al-Kuaiti
18. Omer Sa’eed Gar Allah
19. Abdullah Yahya Al-Wa’adi
20. Khaled Mohammed Al-Batati
21. Kasem Yahya Al-Remi
22. Mohammed Ahmed Al-Remi
23. Mansour Naser Al-Baihani