Apparatus to secure an Automated Teller Machine (ATM) or other structure are disclosed herein. One apparatus includes an arm including an attachment and a lockpin that engages the attachment in an engaged position. The lockpin is configured to prevent the arm from disengaging from the engaged position when a force is applied to the arm. Another apparatus includes an arm including an attachment that prevents rotation of the arm, a lockpin that engages the attachment in an engaged position, and a lock connected to the lockpin to prevent releasing the lockpin from the engaged position. An ATM includes a frame, a gate, and an abutment. The gate includes an arm including an attachment that locks the arm. The abutment includes a lockpin that engages the attachment in an engaged position to prevent the arm from unlocking and a lock connected to the abutment to prevent access to the lockpin.