In 2001, Canada deployed troops to Afghanistan as part of the U.S. stabilization force and the UN-authorized, NATO-led International Security Assistance Force. In February 2007, Canada, Italy, the United Kingdom, Norway, and Russia announced their joint commitment to a $1.5-billion project to help develop vaccines for developing nations, and called on other countries to join them. In August 2007, Canada's territorial claims in the Arctic were challenged after a Russian underwater expedition to the North Pole; Canada has considered that area to be sovereign territory since 1925. In September 2020, Canada joined the COVID-19 Vaccines Global Access (COVAX) program, which aims to ensure equal access to a potential COVID-19 vaccine for all member countries and to help lower-income countries secure doses.