Police have arrested a 20-year-old Los Angeles man who allegedly threatened to shoot a random pedestrian if his Twitter post was retweeted a hundred times. The Los Angeles Times reports (http://lat.ms/1o0O1NF ) Dakkari Dijon McAnuff was booked on suspicion of making criminal threats. The investigation began Wednesday morning when police officers were notified about a photo on Twitter. It showed a rifle pointed at a Los Angeles street with the caption "100 (retweets) and I'll shoot someone walking." Investigators say they were able to link McAnuff to the Twitter account and track it to a home in the downtown area, where he was arrested Wednesday. Police later determined the weapon was an air rifle, which was recovered from the home. http://english.ahram.org.eg/News/96679.aspx