Mom, can I be a hazmat pro for Halloween?

One sunny morning in mid-October, Anne poured the milk for her kids’ cereal and asked, “Hey guys—what do you want to be for Halloween this year?” Seven-year-old Kyle said, “Spider Man!” Nine-year-old Jenna said, “Wonder Woman!” And eleven-year-old Zack said, “A hazmat professional!” “A hazmat professional?” Anne shut the refrigerator and peered at Zack. “Is