The airstrikes were reported to have killed hundreds of AQAP militants. The US continued its airstrikes afterward. Around 1–2 April 2017, the US carried out another 20 airstrikes, increasing the total number of airstrikes against AQAP in 2017 to 75, nearly double previously yearly record of 41 airstrikes in 2009. On August 31, 2019, at least 40 al Qaeda operatives were killed in airstrike carried out by the United States on a training camp in presence of the leaders of Hurras al-Deen, Ansar al-Tawhid and other allied groups in Syria. The group has taken advantage of Yemen's "slow collapse into near-anarchy. Widespread corruption, growing poverty and internal fragmentation have helped make Yemen a breeding ground for terror." More than two years later, on April 25, 2012, a suspected US drone strike killed Mohammed Said al-Umdah, a senior AQAP member cited as the number four in the organization and one of the 2006 escapees. He had been convicted of the 2002 tanker bombing and for providing logistical and material support. Yemeni analyst, Barak Barfi, discounted claims that marriage between the militant group and Yemeni tribes is a widespread practice, though he states that the bulk of AQAP members hail from the tribes. AQAP is a popular choice for radicalized Americans seeking to join Islamist terror organizations overseas. In 2013 alone, at least three American citizens or permanent residents — Marcos Alonso Zea, Justin Kaliebe, and Shelton Thomas Bell — have attempted to join AQAP. They count among over 50 Americans who have attempted to join terrorist groups overseas, including AQAP, since 2007. Reportedly, as many as 20 Islamist British nationals traveled to Yemen in 2009 to be trained by AQAP. In February 2012, up to 500 Internationalistas from Somalia's Al Shabaab, after getting cornered by a Kenyan offensive and conflict with Al Shabaab national legions, fled to Yemen. It is likely that a number of this group merged with AQAP. The following is a list of people who have been purported to be AQAP members. Most, but not all, are or were Saudi nationals. Roughly half have appeared on Saudi "most wanted" lists. In the left column is the rank of each member in the original 2003 list of the 26 most wanted.