National Hero Day!

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Across
  1. 2. a person trained and licensed to treat sick people
  2. 4. known as the "Man of Steel" and whose weakness is kryptonite
  3. 5. an adult chosen by law to be responsible for the care and protection of a child or a person who cannot care for themselves
  4. 8. one of the world's mightiest heroes and the leader of the Avengers
Down
  1. 1. a person responsible for enforcing the law
  2. 3. a person trained to work as a doctor's assistant or as a provider of emergency medical care
  3. 4. tennager from Queens, New York who gained superhuman strength, speed, and agility from a radioactive spider bite
  4. 6. a person trained to combat and extinguish fires
  5. 7. Gotham native who has a stringent moral code and strong sense of justice