Orem firefighters watch Tuesday as an old house burns to the ground. Normally firefighters don't just sit back and watch, but the house has been the site of numerous "practice" fires over the past several weeks. The Orem City Fire Department started the fires in order to practice putting them out. Lt. Ron Mosher, division fire chief, said the opportunity to hone firefighting skills on a house scheduled for demolition comes only every six to eight months so they try to make the most of it. Using scrap wood, straw, diesel fuel and road flares, the firefighters start a fire in the house, then enter the house to quench the flames. The fires are set in such a way that no structural damage is caused, enabling the crews to use the house safely many times.