CMO pursues legislative objectives shared by a group of Members, and many CMOs meet regularly to exchange information. The Sergeant at Arms , who is the chief law enforcement officer for the House and is responsible for maintaining security, order, and decorum in the House Chamber, the House wing of the U.S. Capitol, and House office buildings. The Chaplain , who opens each meeting of Congress with a formal prayer??a custom since the First Congress??and provides pastoral counseling to Members, their families, and congressional staff. Guest chaplains of various denominations regularly offer the opening prayer.