by Amanda Zamora ProPublica, Aug. 8, 2012, 1:16 p.m.
How exactly do campaigns define and track voters? How much do they really know about us? And what privacy issues does it raise? Join us for a live discussion of campaign ads in the 2012 election this Friday on Google Plus.
As Hospital Corporation of America comes under scrutiny, experts say unnecessary heart procedures are common, costing taxpayers, driving insurance premiums and putting patients at risk.