Road to inclusion gained momentum in 1960s
Adam Lambert, Britney Spears and more lend vocals
Victims of Pulse nightclub massacre honored
Events to run concurrently with Dem convention
Proposal seeks non-discrimination bill, but doesn't name Equality Act
Changes made after public input, media attention
Police shortened route amid security concerns
all proceeds from track will be donated to charity
the pair were joined by singer Andra Day
pop star remembered tragedy with song "Purpose"
Anti-gay slurs used to describe U.S. ambassador
