On the eve of the launch countdown for their trip around the moon, the Artemis II astronauts said Sunday they're "ready to go" as ground teams prepare their rocket for blastoff Wednesday, weather permitting. Artemis II commander Reid Wiseman, Victor Glover, Christina Koch and Canadian astronaut Jeremy Hansen flew to the Kennedy Space Center from Houston on Friday to prepare for launch.  Isolated in medical quarantine , they fielded questions from reporters Sunday during a virtual news