June 7 1761: John Rennie, designer of the London Bridge, was born. 1826: German physicist Joseph von Fraunhofer, who was the first to study the dark lines in the solar spectrum (Fraunhofer lines), died. 1938: The Douglas DC-4 made its first test flight. 1981: Israel bombed the Baghdad nuclear reactor. 2000: Judge Thomas Penfield Jackson ordered the breakup of Microsoft, declaring the it should be split into two because it had ''proved untrustworthy in the past.'' This was one boring day in history. | 
