Today in history: On March 12, 1930, Mohandas Gandhi began his 24-day, 240 mile (387 kilometer) “Salt March” to the Indian village of Dandi (then called Navsari) as an act of non-violent civil disobedience to protest the salt tax levied by colonial Britain. Also on this date: In 1912, the Girl Scouts of the USA had its beginnings as Juliette Gordon Low of Savannah, Georgia, founded the first American troop of the Girl Guides. In 1928, the St. Francis Dam north of Los Angeles, California failed,