Cybersecurity is a top priority in the Homeland Security Department?s fiscal 2013 budget request, and spending for it would get a 74 percent boost while overall department funding would remain flat in the coming year.?The cybersecurity threat, in my wheelhouse, is right in front of us,? DHS Secretary Janet Napolitano told the Senate Homeland Security and Governmental Affairs Committee on March 21.There was disagreement among the senators on what the role of DHS should be in protecting the nation?s critical infrastructure, however. Committee Chairman Sen. Joseph Lieberman (I-Conn.), who called cybersecurity ?the most significant vulnerability we have in homeland security today,? has introduced a bill that would give the department oversight over the security of designated critical infrastructure. The panel’s ranking Republican, Sen. Susan Collins of Maine, is a co-sponsor of the bill.