I believe that the best answer for this question is "are." You are referring to two parties here, both the lion tamer and the clowns. This would mean that your applicable verbs must also be plural. Since "are" is the plural version of "is," it is the most suitable word to use in this situation. Hope this helps.
The chemicals had caused the eruption of smoke that filled the air. (Not sure if this is 100%)
Nick calls Tom and Daisy “careless people” because he recognizes them as selfish, insensitive individuals who take advantage of people and retreat back into their money without accepting responsibility for their actions. After spending time with the Buchanans, Nick is appalled by their lifestyle and reckless decisions.
Answer:
The men that go to the Moon rest in the space station or on their rocket.
