After slipping 0.2 percent in the first quarter of the year, the debt activity of Fannie Mae and Freddie Mac bounced backed a bit in the second quarter, with combined debt outstanding rising 6.9 percent, from $1.578 trillion to $1.686 trillion, already surpassing the $1.581 trillion issued in all of 2007, according to the latest analysis by Inside The GSEs... [Includes one chart]