II 115th CONGRESS 2d Session S. 2836 IN THE SENATE OF THE UNITED STATES May 14, 2018 Mr. Johnson (for himself, Mrs. McCaskill , Mr. Hoeven , Ms. Heitkamp , and Mr. Cotton ) introduced the following bill; which was read twice and referred to the Committee on Homeland Security and Governmental Affairs A BILL To assist the Department of Homeland Security in preventing emerging threats from unmanned aircraft and vehicles, and for other purposes.