On today's news brief: Senator Markwayne Mullin - Trump's pick to lead the Department of Homeland Security - faced tough questions about border security and counterterrorism priorities, most allies have declined to join the U.S. military operation against Iran's leadership, tragedy has struck Nigeria with three suspected suicide bombings took place in Maydoogaree, and a federal judge blocked an Arkansas state law that would have required Ten Commandments posters in public school classrooms.