In Bosnia-Herzegovina studying fault activity along the Dinaric Alps, American selsmologists WALTER HILL and his daughther LAURIE found themselves withnessing first-hand the horrors of ethnic cleaning when the ever-present tension between Muslims and Serbs boiled over, resulting in a major battle for control of a southeastern Bosnia town. The Hills made arrangements to fly over the Dinaics Alps to nearby Croatia, but when reinforcements from Yugoslavia arrived to fortify the Bosnis Seb offensive, they realized they were in frave danger. They managed to arrange for another pilot to fly them out earlier, and are heading to a small airstrip, Hill and Laurie fear their chances of getting out of the country alive are rapidly dwindling.