Hundreds attended commemoration in Israeli city of Tel Aviv
Hundreds gathered in Istanbul to protest Hande Kaderās death
Chris Verdugo heard gunshots from Istanbul hotel room
Migration group cancelled menās trip to Toronto
Gay German lawmaker among those detained
Turkish police arrested three men on June 17
15-year-old Syrian boy stoned to death
Randy Berry scheduled to speak to participants on March 29
Declaration does not include LGBT Syrians, Iraqis
Gay U.S. ambassador to Dominican Republic receives sustained applause at event