Voters last September overwhelmingly approved 'Marriage for All' law
Istanbul officials sought to prevent event from happening
Rule takes effect in 2022-2023 season
Gunman opened fire at Oslo gay bar
Organizers sharply criticized authorities' decision
Maria Alyokhina fled Russia disguised as a food delivery driver
Bill passed in country's Parliament on Wednesday
Police have charged one man in connection with the killings
EuroPride fundraiser has raised more than $17,000
The National Assembly unanimously approved ban