Hackers can take over thousands of infected computers, then send them secret commands without the PC's owner ever noticing. Once corralled, these "botnets" can be used to send spam or launch denial of service (DoS) attacks that overwhelm websites.
How some veterans of the wars in Iraq and Afghanistan are helping turn around a drug-infested neighborhood of Baltimore – and themselves.
What happens when ordinary people decide to pay it forward? Extraordinary change. See how individuals are making a difference...
Pastor Jean Enock Joseph (c.) visits one of his projects in Croix-des-Bouquets, just outside Port-au-Prince, Haiti’s capital.
Jean Enock Joseph teaches self-help to lift Haiti
Pastor Jean Enock Joseph doesn't shy from Haiti's toughest problems. His message: Haitians have the ability to help themselves.
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