<p>The tighter security rules imposed after the attempted bombing of an airliner on Christmas 2009 reveal a security threat that persisted for more than seven years after the Sept. 11, 2001, terrorist attacks.<br /><br />Until then, even as commercial passengers were forced to remove their shoes, limit the amount of shampoo in their carry-on luggage and endure pat downs, hundreds of foreigners with known or suspected ties to terrorism passed through security and successfully flew to the United States each year, US officials told the AP.<br /><br />The government said these foreigners typically told Customs officers they were flying to the US for legitimate reasons such as vacations or business.<br /><br />Security practices changed after an admitted al-Qaida operative from Nigeria was accused of trying to blow himself up on a flight to Detroit on Christmas 2009.<br /><br />Until then, airlines only kept passengers off US-bound planes if they were on the no-fly list, a list of people considered a threat to aviation.<br /><br />Now before an international flight leaves for the US, the government checks passengers against a larger watch list that includes al-Qaida financiers and people who attended training camps but aren't considered threats to planes.<br /><br />The government was checking this list before, but only after the flight was en route.<br />If someone on the flight was on the watch list, the person would be questioned and likely refused entry to the country after the plane landed.<br /><br />"As terrorists keep adapting and changing their approach, so must we," Sen. Jay Rockefeller told the AP. During a Senate hearing shortly after the attempted Christmas attack, Rockefeller raised concerns about divisions among the different watch lists.<br /><br />Hundreds of people linked to al-Qaida, Hamas, Lashkar-e-Taiba and other terror groups have been kept off airplanes under the new rules.<br /><br />They include what US officials described as a member of a terrorist organization who received weapons training, recruited others, fought against American troops and had a ticket to fly to the US.<br /><br />Another traveler prevented from boarding a US-bound flight was a member of a terrorist organization whom intelligence officials believe had purchased equipment for terrorism.<br /><br /><br /></p>
<p>The tighter security rules imposed after the attempted bombing of an airliner on Christmas 2009 reveal a security threat that persisted for more than seven years after the Sept. 11, 2001, terrorist attacks.<br /><br />Until then, even as commercial passengers were forced to remove their shoes, limit the amount of shampoo in their carry-on luggage and endure pat downs, hundreds of foreigners with known or suspected ties to terrorism passed through security and successfully flew to the United States each year, US officials told the AP.<br /><br />The government said these foreigners typically told Customs officers they were flying to the US for legitimate reasons such as vacations or business.<br /><br />Security practices changed after an admitted al-Qaida operative from Nigeria was accused of trying to blow himself up on a flight to Detroit on Christmas 2009.<br /><br />Until then, airlines only kept passengers off US-bound planes if they were on the no-fly list, a list of people considered a threat to aviation.<br /><br />Now before an international flight leaves for the US, the government checks passengers against a larger watch list that includes al-Qaida financiers and people who attended training camps but aren't considered threats to planes.<br /><br />The government was checking this list before, but only after the flight was en route.<br />If someone on the flight was on the watch list, the person would be questioned and likely refused entry to the country after the plane landed.<br /><br />"As terrorists keep adapting and changing their approach, so must we," Sen. Jay Rockefeller told the AP. During a Senate hearing shortly after the attempted Christmas attack, Rockefeller raised concerns about divisions among the different watch lists.<br /><br />Hundreds of people linked to al-Qaida, Hamas, Lashkar-e-Taiba and other terror groups have been kept off airplanes under the new rules.<br /><br />They include what US officials described as a member of a terrorist organization who received weapons training, recruited others, fought against American troops and had a ticket to fly to the US.<br /><br />Another traveler prevented from boarding a US-bound flight was a member of a terrorist organization whom intelligence officials believe had purchased equipment for terrorism.<br /><br /><br /></p>