Question: Has every astronaut survived their space journey?, Answer:No, Description of Astronaut: Person who commands, pilots, or serves as a crew member of a spacecraft, Fact1: In 1986, the space shuttle Challenger exploded during launch, killing all astronauts aboard., Fact2: In 2003, the space shuttle Columbia also exploded, again killing its entire crew., Fact3: Various other space flights have resulted in fatal disasters.
Step1: How many astronauts have died during a mission?, Step2: Is #1 equal to zero?, Wikipedia page for step 1: Astronaut, Wikipedia page for step 2: , not_definitive_answer: False, incorrect_answer: False