text: Under legal pressure, the Obama administration will begin telling some suspected terrorists if and why they are on a list of tens of thousands of people banned from flying to, from or within the United States. The new policy allows for an American traveler who has been denied boarding a commercial airliner to petition the U.S. Transportation Security Administration once to find out whether he or she is on the no-fly list and a second time for an unclassified explanation of why he or she is on the list. In some cases, the government will not be able to provide an explanation because of national security concerns. The changes partially lift a veil of secrecy enshrouding a policy that has been a centerpiece of the government's counterterrorism efforts since the September 2001 terror attacks. Grounded or not grounded? Under legal pressure, the Obama administration will begin telling some suspected terrorists if and why they are on a list of tens of thousands of people banned from flying to, from or within the U.S. Above the security line at New York John F Kennedy International Airport in October . But the American Civil Liberties Union, which has been challenging the constitutionality of the no-fly list in an ongoing federal lawsuit, said the changes don't go far enough in giving travelers the legal due process they are entitled to, including seeing the evidence held against them and getting an opportunity to challenge it. The explanations provided to six travelers so far, which were mandated by a federal judge, have been inadequate, the ACLU said. For instance, in a letter to New Jersey resident Amir Meshal, the government's explanation for his inclusion on the list was based on information the FBI obtained from Meshal when he was detained in Africa in 2007, ACLU attorney Hina Shamsi said. The ACLU considers Meshal's detention to be unlawful and said he suffered abuse. 'From the face of the letter, a neutral decision-maker would have no idea whatsoever that any of that occurred,' said Shamsi. The Justice Department declined to comment on the specific constitutionality challenges because of the ongoing lawsuit. Justice Department spokeswoman Nicole Navas said, 'We are committed to a process that protects Americans from terrorist threats while respecting privacy and safeguarding civil liberties.' Last fall, there were about 64,000 people on the no-fly list, according to the government. Typically, less than 5 per cent of those on the list are Americans. The list fluctuates in size. Previously, the government's policy was never to confirm or deny that a person actually is on list, citing national security concerns. In most instances, travelers assume they are on the list because they are instructed to go through additional screening at airports or because they are told they can't board their flights. Travelers have been able to appeal their presumed placement on the list since 2007. Only a small percentage of appeals the government receives each year have been from travelers actually on the list, the government has said. The TSA gets between 15,000 and 20,000 requests a year, and less than 1 per cent of those are actually from people on the no-fly list, said Homeland Security spokeswoman Marsha Catron. In 2014, a federal judge in Portland, Oregon, required that the government notify 13 plaintiffs challenging the constitutionality of the no-fly list of their status on the list, and seven were told they were not on the list. The government provided explanations to the six plaintiffs it confirmed were on the no-fly list, including Meshal. One of the explanations included just a 'single cryptic sentence about alleged travel to a foreign country,' according a court document filed earlier this year. The letters to the six plaintiffs on the no-fly list have been redacted on the public court docket to protect the plaintiffs' reputations, Shamsi said. 'The government had an opportunity to come up with a fair process but failed, so we're challenging it in court again,' Shamsi said. The TSA will continue to handle the petitions under the new policy. The changes are not yet in effect, and have so far only been applied to the 13 plaintiffs in the Portland lawsuit, but the Homeland Security Department said it expects them be in place soon. Catron said individual requests should take months to process, not years. 'These enhancements continue to ensure that individuals who are deemed to be a threat to our aviation security are prohibited from boarding a flight within, or bound for, the United States,' Catron said.
target: Previously, the U.S. did not disclose whether a stopped traveler was on the list or why .
  But facing legal pressure from the ACLU, the Obama administration has enacted a new policy to let Americans know if they are on the list .
  Grounded Americans are also now allowed to inquire about how they got on the list .
  However, the government has not promised to reveal why in all cases - citing possible national security threats .
  Last fall there were about 64,000 people on the no-fly list, and Americans made up approximately 5 per cent .