CHICAGO — Three Senn High School students were shot, one fatally, during a shooting in the Edgewater neighborhood on the North Side Wednesday afternoon, according to authorities. The three victims, CPS students between 15 and 16, were walking in the 1200 block of West Thorndale Avenue, just east of Senn High School, when gunmen inside a vehicle got out and opened fire toward the teens around 4 p.m., police Superintendent Larry Snelling told reporters Wednesday evening. Snelling said the victims were Senn students. Two victims went to Ascension St. Francis in Evanston in critical condition and …