As Americans sit down to file their federal tax returns, a simple question comes to mind -- what's a "fair share" to give the federal government in taxes?
For half the working population, fair means paying almost no income taxes at all.
"The top 10 percent income earners pay about 70 percent of federal income taxes," says Will McBride of the Tax Foundation. "The bottom 50 percent of tax filers have, they pay almost no federal income tax. They pay about 3 percent of federal income taxes."