we didn't start the fire

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Across
  1. 4. It was considered the largest reunion of hippies ever (or Snoopy's best friend).
  2. 5. Color that Americans were afraid of during the Cold War.
Down
  1. 1. One of the first satellites launched to the space(and name of a vaccine).
  2. 2. Scientist that made a cameo in “Oppenheimer”.
  3. 3. "Happy birthday, Mr. President…"