<p>In this Feb. 20 photo, a man walks through a hall at Secret Service offices in Washington.</p>
April 18, 2014
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April 18, 2014 9 p.m.
Slow justice
Cyber cops: Target hackers may take years to find
WASHINGTON - Secret Service investigators say they are close to gaining a full understanding of the methods hackers used to breach Target's computer systems last December.