Three people were killed instantly in a midair collision over Boulder , Colorado . One of the planes was towing a glider , Boulder County Sheriff 's Department says . The glider pilot was able to approach and land safely , sheriff 's department says .
Three people were killed Saturday in a midair collision over Boulder , Colorado . One of the planes was towing a glider , Boulder County Sheriff 's Department says . The glider pilot was able to detach and land safely , sheriff 's department says .