Confronted with the bloodiest weekend in Chicago since being named police superintendent six weeks ago, Eddie Johnson on Monday called the gun violence "completely unacceptable" and said the dozens of shootings highlight "the uphill battle" confronting police. More than 50 people were shot, eight fatally, between Friday afternoon and early Monday, the city's most violent weekend since the end of September, according to a Tribune analysis. The tally included a 3 1/2-hour period early Saturday when one man was killed and 14 others were wounded — the equivalent of someone being shot every 14 minutes. Chicago is already closing in...