I wonder if Hillary Clinton asked the families of the victims "what difference does it make" why our people were attacked?  Obviously, if, as she says, they want to prevent something like this from happening again then wouldn't it be reasonable to know why terrorists attacked that location? 

Here's a longer version of her testimony over the Benghazi attacks and her exchange with Sen. Ron Johnson.  The testy part of the clip begins around 3:30.

Meanwhile, Clinton got some really tough questions from Democrats, as well: