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(THE CONVERSATION) “This year, American astronauts will go back to space in American rockets.”

This one sentence from the 2019 State of the Union address may have escaped your notice. It ended a paragraph in which the president paid tribute to astronaut Buzz Aldrin of the Apollo 11 mission to mark the the 50th anniversary of the first moon landing. From that point, the speech transitioned to increasing the standard of living for Americans in the 21st century. A small sentence, perh...