The exercise was organized by the Military Aircraft Accident/Incident Investigation Board and the National Forensic Laboratory of the Ministry of the Interior, in cooperation with Fraport Slovenija. The plane crash scenario, a collision between a military aircraft with two crew members and a civil aircraft with 50 passengers and four crew members, offered a realistic crisis situation. In order to make the whole exercise even more challenging, the planners of the exercise decided that the cargo of one of the aircraft included hazardous goods and that it belonged to a foreign country which was a member of NATO. The firefighters, who needed no more than three minutes to reach the crash site, offered us an insight into the procedures of combating the fire and securing the location of the accident, while at the same time protecting possible evidence. The firefighters identified hazardous objects, and searched for possible victims and identified them, which is a demanding task. In our case there were eleven casualties, including the pilot of the military aircraft. Since the military aircraft belonged to a foreign nation, in a real case scenario it would be necessary to include military investigators and an investigator from the foreign country, in addition to the civil investigators.