information on the more than fifty years of Federal Air Marshal Service. On July 1, 2014, a new book and personal memoir was published by Biles. The book, titled Unsecure Skies, gave a behind the scenes look at the inner workings of the Federal Air Marshal Service under the Transportation Security Administration, including discussions on alleged bureaucratic strain and favoritism within the agency. Immigration and Customs Enforcement Budgeting issues within the TSA created tension between funding for airport screeners versus the FAMS, and in time the FAMS was realigned to U.S. Immigration and Customs Enforcement (ICE). The reasoning was that the FAMS could be re-designated as criminal investigator/special agents and would have a career path. ICE has an investigative division, Homeland Security Investigations (HSI), that is the critical investigative arm of the Department of Homeland Security whose special agents investigate criminal organizations illegally exploiting America's travel, trade, financial and immigration systems. HSI special agents would be cross trained to serve as supplemental FAMS in the event of a national emergency or in response to intelligence requiring additional marshals on flights. Ultimately, one of Asa Hutchinson's final decisions before resigning as head of DHS's Border and Transportation Security Directorate was the issuance of a memorandum determining that air marshals would not be HSI special agents. In 2005, Homeland Security Secretary Michael Chertoff conducted a second-stage review of DHS' organization and ordered the FAMS to be moved from ICE and back to the TSA. This move to TSA was effective October 1, 2005. Controversies Rigoberto Alpizar incident On December 7, 2005, two Federal Air Marshals shot and killed 44-year-old U.S. citizen Rigoberto Alpizar, a passenger of American Airlines Flight 924, on a boarding bridge at Miami International Airport. According to initial media reports of the incident, a fight broke out between Alpizar and his wife, after which Alpizar suddenly ran up the aisle from the back of the plane. Lonny Glover, national safety coordinator for the Association of Professional Flight Attendants, said, "As the man came forward it was obvious that he was upset ... That's when one of our attendants at the front of plane told him, 'Sir, you can't leave the plane.' His response, she said, was implying that he had a bomb in his backpack. It was at that point that the air marshals gave up their cover and pursued him out the door and up the jet bridge."