ISRAEL. On a hilltop near Safed, in the northern Galilee, school children make a pilgrimage to a monument to a 'home made mortar'.During the fighting in the town, the surrounded and outnumbered Jews constructed two mortars, more notable for the amount of noise they produced than for their practical effect. But along with the noise of the mortars, there came a rainstorm, the first in memory in that region during the month of May.The attacking Arabs, convinced, according to the story, that the Jews had developed an atomic weapon, then fled the town.