FEMA Firefighters official hand book contains UFO rescue training

US government has been from long strongly denying the possibilities of UFO activities on planet earth but recently straggling discovery was made by the UFO hunters about the training handbook officially contains a chapter which deals with UFO don't believe it? see the below clip



after seeing the video one question that comes to my mind is why the heck government included UFO rescue content in the training material when it is officially denying their existence from way back from 1940's till present? do share your thoughts here people