**SNIP** Over the past few years, the number of security incidents at federal agencies involving the potential exposure of personal information has skyrocketed -- from about 10,400 in 2009 to more than 25,500 in 2013, according to the Government Accountability Office. There’s no data yet this year on the total number of breaches at agencies in 2014. But with the year almost in the rearview mirror, Nextgov takes a look back at the 10 most impactful, high-profile or otherwise eyebrow-raising federal agency breaches. 1. White House Hacked The Obama administration has made cybersecurity a key priority, so it must have...