Groups to present petition with more than 300,000 signatures to Olympic committee
Singer spoke out against St. Petersburg anti-gay law during 2012 concert
South American country among 11 nations to allow gay nuptials
Organizations urge U.S., media to highlight Russia’s gay rights record
Group protested country’s gay rights record outside Russian embassy in D.C.
Ignacio Estrada Cepero and Wendy Iriepa Díaz remain critical of island’s government
Pontiff spoke to reporters after leaving Brazil
Growing number of activists have urged athletes to skip games
Singer Ricky Martin among those who support effort
Southern Poverty Law Center said organizations further inflame homophobia in country
