The House Homeland Security Committee held its first hearing on the Boston Marathon bombing and aftermath on Thursday. Witnesses included the Boston police commissioner and former Sen. Joe Lieberman. Panel Chairman Mike McCaul has been highlighting intelligence failures.
The Pentagon accused the Chinese military and government of cyberattacks on U.S. computers Monday. A Chinese military official denied those accusations. Dan McWhorter, researcher with the computer security firm Mandiant, explains how the company traced multiple cyberattacks to computers in China.
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