Taliban regained control of country on Aug. 15
Country's president met with Joe Biden at the White House on Wednesday
More than 50,000 people supported citizens initiative
Xulhaz Mannan hacked to death in 2016
Taliban entered Kabul on Aug. 15
Congressional LGBTQ+ Equality Caucus sent letter ahead of Sept. 1 meeting
Vote caps off decade-long fight
Roundtable with advocacy groups took place in Hanoi
Lack of opportunities, violence prompt LGBTQ people to migrate
Chris Pappas spearheaded letter to Antony Blinken