"My message to the Pope would be, don't take sides on the science. Don't make the same mistake as seven out of 10 judges in the trial of Galileo, when they invited him to retract his views."

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My goodness, what we want in a leader is someone with judgment, not someone who is so reckless as to stand on the stage and say, "Yes, I'm jumping up and down; I'm going to shoot down Russian planes." Russia already flies in that airspace. It may not be something we're in love with the fact that they're there, but they were invited by Iraq and by Syria to fly in that airspace.

— Rand Paul