Angry in America ... and protected - On the eve of the April 19 protest planned by patriot groups in Washington, and on the heels of the Tea Partyâ€™s Tax Day protests, we look at the way disgruntled citizens are expressing themselves. The angry rhetoric is not just coming from fringe groups but also mainstream liberal and conservative camps. And while much of theÂ language sounds threatening, most of it is protected. Experts say itâ€™s important to national security to let people vent, but some messagesÂ in recent weeks have pressed the boundaries of free speech. CNN's Eliott McLaughlin reports.
Password protection for pacemakers - Just like computers, pacemakers and cardiac defibrillators can be hacked â€” potentially stopping a personâ€™s heart. A researcher at the University of Washington proposes some unique solutions, includingÂ putting passwords on the health devices and tattooing the password on the patientâ€™s skin. By John Sutter, with photo of the proposed tattoo system.