I 115th CONGRESS 1st Session H. R. 4650 IN THE HOUSE OF REPRESENTATIVES December 14, 2017 Mr. Aguilar (for himself, Ms. Titus , and Mrs. Watson Coleman ) introduced the following bill; which was referred to the Committee on Homeland Security A BILL To amend the Homeland Security Act of 2002 to develop and make available guidance relating to domestic preparedness for and collective response to terrorism regarding active shooter and mass casualty incident response assistance, and for other purposes.