http://www.cnn.com/2014/11/28/us/bla...html?hpt=hp_t2

"The staggering number of checks -- an average of almost three per second, nearly three times the daily average -- falls on the shoulders of 600 FBI and contract call center employees who will endure 17-hour workdays in an attempt to complete the background reviews in three business days, as required by law, FBI spokesman Stephen Fischer said."