Planetary science. The small ones can kill you, too.
D003365:Costs and Cost Analysis; D004190:Disasters / Q000517:prevention & control*; D018534:Earth, Planet; D005378:Financial Support; D019110:Meteoroids; D018543:Minor Planets; D018570:Risk Assessment; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000191:economics