There's been plenty of evidence recently that the Smart Grid could become a serious security risk for IT and households. Now comes something potentially just as troubling: A U.S. Congressman warns that the grid can be taken down by an electromagnetic weapon. Rep. Roscoe Bartlett (Rep.-Md.) issued that warning recently. He's not your typical "the-sky-is-falling" Congressman --- he's a former research scientist and engineer and has previously has worked on projects for NASA and the military. Bartlett issued his warning yesterday at a House Science subcommittee hearing about how to roll out the Smart Grid. At the hearing, he warned...