Activists from Haiti among hundreds of attendees
Letter sent to President Trump on Jan. 31.
Jason Jones says he has received nearly 50 death threats
Barbados activist describes decision as ‘groundbreaking’
U.S. Embassy describes Rene Martínez as ‘rising political figure’
Advocates protested government officials during opening plenary
Violence, discrimination, poverty among topics discussed
Gathering took place in Miami on Sept. 19
Advocates seek repeal of anti-sodomy laws
Gathering ‘to open many doors’
