On this day in 1930, Indian political and spiritual leader Mohandas K. Gandhi begins a 200-mile "salt march," after his doctor advises him to cut back on salt.

On this day in 1933, President Roosevelt delivers the first of his radio "fireside chats," telling Americans they "better buy Birds-Eye."

On this day in 1998, astronomers debunk a warning that a mile-wide asteroid might collide with Earth in 2028, saying the calculations are off by 600,000 miles.

On this day in 2028, a mile-wide asteroid collides with Earth, wiping out everyone over six feet tall.


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