RT @NASAKennedy: Today, we honor the crews of Apollo 1 and space shuttles Challenger and Columbia, as well as other astronauts who lost their lives in the pursuit of spaceflight. Join us virtually from @ExploreSpaceKSC for our Day of Remembrance ceremony. https://t.co/Ts0JBlDqVe NASA Atmosphere Climate Change Science on Telegram by @ClimateChangeScience A @grttme project - Other backups: @Hallotme