You're sending your people to agency meetings for familiarization with other agency personnel. Resources, equipment, are being ID'd, staging areas established, emergency routes, SWAT procedures, telecom, medivac, traffic control, ID cards, etc. are covered.
Nothing can go wrong.
Nothing, that is, except for supervision. A police supervisor's responsibility is to supervise. All must understand fully their supevisory duties and responsibilities. As part of the supervisory process, supervisors must continually ask their subordinates questions concerning the subordinates' responsibilities, assignment, their activities, where they have been during their hours of duty. Each officer must be totally familiar with his or her area of responsibility and be questioned about it.