Another planet similar to the planet...

                      SPACEFLIGHT TRAGEDIES

 Considering all the potential dangers, manned spaceflight has been a remark- ably safe undertaking. Those who have died on space missions (4.I percent of American astronauts, 0.9 of Russian cosmonauts) have become heroes. Although it occurred during a training procedure, the 1967 loss of the three-member Apollo. I crew had a great impact in the United Stares. No one who witnessed the launch of the space shuttle challenger on January 28, 1986, will forget the horror of the explosion that occurred 73 seconds after liftoff, killing all seven crew members, including New Hampshire schoolteacher Christa McAuliffe. And n February , 2003, the entire crew of the space shuttle Columbia perished over the southwestern United States.