On February 3rd, 1913, one of the two most historic events in US history
took place: the ratification of the 16th amendment, which established
Congress' right to impose a Federal income tax on Americans, and
overturned Article I, Section 9 of the US Constitution which explicitly
prohibited a general income tax.

The amendment was brief and to the point, and read as follows:

"The Congress shall have power to lay and collect taxes on incomes,
from whatever source derived, without apportionment among the
several States, and without regard to any census or enumeration."

And with that, the US Federal Income Tax was born and has been with you
americans for precisely 100 years.

http://www.zerohedge.com/news/2013-0...ral-income-tax