Northern Ireland came into being on May 3, 1921 as Ireland became independent from Britain and was split between pro-Ireland nationalists and pro-UK unionists, who hold the most power.
A journalist was killed while covering rioting in the border town of Londonderry.
The charges announced on Thursday come more than two years after police referred their findings to prosecutors and almost nine years after the conclusion of the Bloody Sunday Inquiry.
The homemade bomb engulfed a carriage in flames but apparently failed to fully explode. It was Britain's fifth major attack so far this year.
Voting will take place on March 2 after collapse of power-sharing government over a contentious green energy scheme.
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