Tragedies of the Space Travel

All the advancements in technology that were being made were not perfect and still are immune to making mistakes. On January 28, 1986 America was shocked by the destruction of the space shuttle Challenger, and the death of its seven crew members.
As is expected in a field of work that's exploratory and uncertain such as the National Aeronautics and Space Administration (NASA) space program, any tragedy that occurs often makes inside employees, government officials, and even the general public, wonder why it's necessary at all to continue when the consequences are so grave.
On the morning of Feb. 1, 2003, space shuttle Columbia broke apart roughly 40 miles above the earth's surface in the sky over the state of Texas. On this return flight to earth, seven astronauts died aboard the shuttle, six of which were American plus one Israeli astronaut. Five of the astronauts were men and two were women. Four of these people had never even flown in space before. NASA has not yet discovered the reason for this tragedy although there has been speculation.
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