Brazilian Congresswoman Erika Hilton among participants
Glenn Greenwald announced husband's death on Tuesday
Hungarian Prime Minister Victor Orbán to headline event
Conversion therapy, treatment of intersex people documented
U.S. Ambassador to the U.N. Linda Thomas-Greenfield chaired Monday meeting
Activists from Colombia, Afghanistan expected to speak at March 20 gathering
Two presidents met at the White House on Friday
Church teaching about homosexuality remains unchanged
VoteLGBT organized Brasília gathering
Embattled New York congressman lied about life and career
