A toy dog named Seaman Jr., representing the Newfoundland that accompanied Lewis and Clark on their historic expedition in the 1800's, is seen here, Thursday, May 3, 2018 at NASA Headquarters in Washington. Seaman Jr. is headed to the International Space Station this summer to help celebrate NASA’s 60th Anniversary and the National Trail System’s 50th anniversary. Photo Credit: (NASA/Aubrey Gemignani)