By Mike Wall
 
NASA honored its fallen astronauts with a special day of remembrance Wednesday Jan. 28, the 29th anniversary of the Challenger space shuttle tragedy. Space agency officials conducted ceremonies at several different sites around the country during the annual event, to pay tribute to the three crewmembers killed in 1967’s Apollo 1 fire, the seven astronauts lost when Challenger exploded in 1986 and the seven crewmembers who died when the shuttle Columbia broke apart upon reentry to Earths atmosphere in 2003.