Organizers joined anti-Russia protests in country's capital
Mark Takano among Global Equality Caucus founding members
Activist blames incidents on 'far-right groups'
Government officials have asked activists to cancel event
Aldo Dávila is member of leftist Winaq Movement
Activists celebrated landmark decision in country's capital
Activists say landmark ruling could have implications across Africa
Maykel González Vivero is participant in journalist program