In the spirit of enhancing the security of international civil aviation, on March 23, 2016 the United States and Argentina signed an aviation security agreement that sets forth the legal framework for the reciprocal deployment of In-Flight Security Officers (IFSO) on board certain passenger flights. This agreement will, subject to applicable domestic and international law and consistent with standards and recommended practices promulgated by the International Civil Aviation Organization (ICAO), permit either country to deploy its IFSOs onboard aircraft registered in that country that operate between the two countries. This agreement will strengthen Argentina’s aviation security efforts by furnishing a security presence onboard passenger flights between the United States and Argentina. IFSOs serve as an active last line of defense against terrorism and air piracy, and are an important part of a multi-layer strategy adopted by many countries to thwart terrorism in civil aviation. This agreement allows Argentina to take an active part in this strategy. Globally, more and more countries accept the value of IFSO programs in the fight against terrorism.