The first time Rebecca Brown walked to elementary school without her parents, three adult men got out of a dented van and headed in her direction. Her mother, an Italian-American from Brooklyn, had prepped her for dangerous situations she might face in Santa Monica, so Rebecca did what she had been trained to do and ran away from the men, screaming wildly to neighbors for help.The men were gardeners.Stop, Drop, and Panic...and Other Things Mom Taught...