Hackers from Syria and Iran are on the prowl to hold a neighborhood or city's gasoline supply up for ransom, or, worse, cause it to spill and explode, with Washington being high on the target list, according to a new report. The report, issued over the weekend by a group of digital security sleuths, found that a number of groups, including the notorious Syrian Electronic Army — known for hacking news groups — are looking for soft targets they can take control of easily through the Internet, and use to cause a variety of mayhem. The report shows that retail...