NASA has added extra safeguards to the agency’s standard pre-launch quarantine protocol to protect astronauts Bob Behnken and Doug Hurley from the coronavirus and other contagions in the final two weeks before their scheduled May 27 launch on SpaceX’s Crew Dragon spacecraft.

SpaceX’s Falcon 9 rocket and Crew Dragon spacecraft emerged from the company’s hangar at the Kennedy Space Center early Thursday for the quarter-mile trip up the ramp to historic Launch Complex 39A, ready for final testing before liftoff on the first U.S. mission to carry astronauts into orbit in nearly nine years.

Amid a Russian spacewalk to carry out routine maintenance and inspections outside the International Space Station, two NASA astronauts and a Japanese crewmate staged a culinary first in orbit — harvesting and eating a few leaves of leafy, space-grown red romaine lettuce.