Following the deadly 2018 attack on the Tree of Life Congregation in Pittsburgh, many Jewish houses of worship increased their security measures. Last week's hostage-taking at Congregation Beth Israel in Colleyville, Texas, was a forceful reminder that threats remain, Arkansas Jewish leaders say. Rabbi Barry Block of Congregation B'nai Israel in Little Rock knows one of the former hostages, Rabbi Charlie Cytron-Walker. "He served as president of our Southwest Association of Reform Rabbis, which includes Arkansas, and he's a wonderful colleague," Block said. As the armed standoff unfolded Jan. 15, "I was praying, and I was following the news, and...