Helmut Jahn, the famed German architect who designed the James R. Thompson Center and other iconic buildings, died Saturday afternoon when he was struck by two vehicles while riding his bicycle in suburban Campton Hills. Jahn, who lived in nearby St. Charles, was riding his bike north on Old Lafox Road near Burlington Road about 3:30 p.m. when he failed to brake at a stop sign, according to a news release from Campton Hills police. Two vehicles traveling in opposite directions on Burlington then struck the 81-year-old. He was pronounced dead at the scene, police said. The driver of one...