Rabbi Charlie Cytron-Walker. Photo: Facebook The rabbi of the synagogue in Colleyville, Texas who was held hostage by a gunman on Saturday expressed profuse appreciation after being freed along with three other hostages, saying, “I am grateful to be alive.” The gunman, identified by federal authorities as British citizen Malik Faisal Akram, was killed after a more than 10-hour standoff. Akram claimed to be acting to obtain the release of Aafia Siddiqui, a Pakistani neuroscientist serving an 86-year sentence in Texas on charges of attempting to kill US troops in Afghanistan. Law enforcement officials said the congregation’s rabbi, Rabbi Charlie...