 Complete the following phrase:  From the start of the modern biathlon in 1958 until 1965, international competitions were held exclusively using high power centerfire cartridges such as the .30-06 and 7.62 NATO. Fullbore biathlon was part of the Winter Olympic Games in 1960, 1964, 1968, 1972 and 1976. Fullbore World Championships were held from Saalfelden 1958 to Vingrom 1977, with Lake Placid 1973 being the first time the World Championships took place outside Europe. Caliber discussions was a recurring subject, and there was a long trend of different nations moving towards various 6.5 mm or smaller calibers. In 1976 it was decided by the International Modern Pentathlon Union UIPM that all international championships starting from 1 January 1978 would be conducted using the .22 Long Rifle LR smallbore caliber. The last major championship using fullbore rifles was the 