The astronauts make their official appearance and greet the crowd before launch

From left to right, NASA astronauts Luke Delaney and Jessica Watkins (front), and Canadian Space Agency astronaut Joshua Kutryk, along with Roscosmos cosmonaut Sergey Teteryatnikov (back), wave to family and friends as they prepare to depart at the agency's Kennedy Space Center in Florida for launch of Crew-13. (Credit: NASA)