its arctic infrastructure with a fleet of ice breakers, airports and other facilities and the state department says the region is vital for the russian economy. 20% of the nation's gdp and exports already come from the arctic. it's a region that contains an estimated 13% of the world's undiscovered oil and 30% of its undiscovered natural gas. russia's recent actions have not gone unnoticed. reuters reports america's new secretary of defense has called russia's arctic moves aggressive steps. it's a reminder that relations between moscow and washington have ways to go before they truly thaw. the correct answer to the gps challenge question is d. the pugh research center published interesting facts about muslims and immigration last year. about 10% of legal immigrants coming to the united states are muslim. of the 85,000 refugees who entered the united states in the fiscal 2016 year, about half were muslim.