The administration informed Congress it had approved the possible sale of Stinger anti-aircraft shoulder-fired missiles and related equipment, according to a news release from the US State Department.“It is vital to the U.S. national interest to assist Finland in developing and maintaining a strong and ready self-defense capability,” the news release said.“This critical platform will bolster the land and air defense capabilities in Europe’s northern flank, supporting the U.S. European Command’s top priorities.”The potential arms sales come as Finland, which shares a border with Russia, seeks to join NATO.The reason most countries join NATO is because of Article 5 of the North Atlantic Treaty, which stipulates that all signatories consider an attack on one member an attack against all.Finland will have no difficulty absorbing this equipment into its armed forces.”CNN’s Jack Forrest, Rob Picheta and Joshua Berlinger contributed to this report."