of Homeland Security personnel, as appropriate. (4) The Bureau of Alcohol, Tobacco, Firearms, and Explosives, with the approval of the Attorney General. (5) Other Federal, State, local, Tribal, and foreign law enforcement agencies, including Mexican law enforcement agencies, as appropriate. (d) Resources Not later than 180 days after the date of the enactment of this Act, the Secretary of Homeland Security, in coordination with the Attorney General, shall submit to Congress a report that identifies technology, dedicated personnel, and other resources required for the following purposes relating to the establishment of the Border Enforcement Security Task Force unit in accordance with subsection (a): (1) Continuation of Operation Without a Trace and related Bureau of Alcohol, Tobacco, Firearms, and Explosives agency strategy. (2) Conducting pilot programs and operations. (3) Joint training operations. (e) Memorandum of understanding Not later than 180 days after the date of the enactment of this Act, the Secretary of Homeland Security and the Attorney General shall update the 2009 memorandum of understanding between Homeland Security Investigations and the Bureau of Alcohol, Tobacco, Firearms, and Explosives relating to improving coordination on efforts to combat illegal arms trafficking.