Claire Margaret (Vangelisti) Del Guerra, 87, of Great Falls, a retired Cascade County Extension Agent died of natural causes on Monday, September 17, 2012 at her residence. A vigil service will be held on Wednesday, September 19, 2012 at 7:00 pm at O’Connor Memorial Chapel. A funeral liturgy will be held Thursday September 20, at 1 pm at Corpus Christi Catholic Church. Claire is survived by her daughter Dana Del Guerra of Great Falls; a son Tony Del Guerra of Missoula and two grandchildren. She was preceded in death by her husband Serafino Del Guerra in 1963