; and (2) the updated Arctic strategy to improve and enhance joint operations required to be submitted to the congressional defense committees under section 1071 of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ). (b) Inclusion of mission sets The report under subsection (a) shall include a description of current and future mission sets at Northern Tier bases that may further the Arctic strategy of the United States. (c) Northern Tier bases defined In this section, the term Northern Tier bases means installations in the continental United States that are located in States bordering Canada. 1056. Report on the Department of Defense plan for mass-casualty disaster response operations in the Arctic (a) Sense of Senate It is the sense of the Senate that— (1) the Department of Defense may be called upon to support the Coast Guard and other agencies of the Department of Homeland Security in responding to any mass-casualty disaster response operations in the Arctic; (2) coordination between the Department of Defense and the Coast Guard might be necessary for responding to a mass-casualty event in the Arctic