At least 12 members of Osama bin Laden's family currently hold Federal Aviation Administration pilot's licenses that make them eligible to fly aircraft anywhere in the United States, including three who received their licenses just this June, according to an analysis of FAA records provided to ABC News by a computer security firm, Safe Banking Systems.
One of the three who received his FAA licenses this year, Yeslam bin Laden, a half-brother of Osama who lives in Geneva, Switzerland, is named in a civil lawsuit brought by the families of 9/11 victims alleging he helped to finance Osama's al-Qaeda network as it started up in the 1990s in Yemen and the Sudan.
Yeslam disputes the allegations in the lawsuit and, like the entire family, has repudiated Osama.
Still, lawyers for the 9/11 families question whether the FAA has done its job.
"Any ties to Osama bin Laden and al-Qaeda whatsoever, even remote familial ties, require the utmost scrutiny and skepticism," said Don Migliori, an attorney representing 9/11 families.
The FAA and the Transportation Safety Administration (TSA) would not address the bin Laden family pilots specifically but said no current license holders are considered "potential terrorists to harm the flying public."
In 2006, U.S. officials did revoke the license of one bin Laden half-brother, Bakr bin Laden, because of "security concerns," an FAA official told ABCNews.com. Bakr was also named in the 9/11 victims' lawsuit.
Stephen Brogan, a lawyer for Bakr bin Laden, said in a statement to ABC News there was "no basis" for revoking Bakr's FAA license and called it a "reflexive bureaucratic response based solely on the fact that Bakr is half brother to OBL."
The lawyer said "the U.S. military has continued to work with the family companies run by Bakr."
After 9/11, the TSA was charged with vetting the approximately four million people who hold a FAA pilot's license of any kind.
A TSA spokesperson, Lauren Gaches, said the agency completed a comprehensive review of the pilots' list this summer by matching it with the FBI's terrorist screening database.
"TSA now conducts the name matching process for these nearly four million records on a daily basis," said Gaches.
Security experts say the TSA's job is complicated by the fact that the FAA aviation database does not contain vital information such as addresses and dates of birth, and is rife with misspelled names. For example, bin Laden is spelled several different ways in the FAA records, including "Binladin," "Ben Laden," and "Benladen."
"The many different spellings of bin Laden in the data make it impossible to determine exactly who has a license," said Mark Schiffer of Safe Banking systems, a computer security firm that analyzed the FAA records.
"The information is so thoroughly compromised that any vetting system built on it is unreliable," said Schiffer.
According to the FAA records, the bin Laden family members who currently hold FAA licenses include:
Yeslam bin Laden, the half brother of Osama who lives in Geneva and runs the investment arm of the family business, the Saudi Binladin Group, SBG. His FAA license was issued just this year in June 2009, making it possible for him to fly his own Lear jet.
Omar bin Laden, a half-brother of Osama who is on the board of directors of SBG. He has held his FAA private pilot license since 1977.