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There's a war going on, and it's raging here at home -- not in the streets or the fields, but on the Internet. You can think of it as a war on the digital homeland. If you work for a power company, bank, defense contractor, transportation provider, or other critical infrastructure type of operation, your organization might be in the direct line of fire. And everyone can become collateral damage. A cyber war has been brewing for at least the past year, and although you might view this battle as governments going head to head in a shadow fight, security experts say the battleground is shifting from government entities to the private sector, to civilian targets that provide many essential services to U.S. citizens.