[what's up]

staffers say they still want to question Panetta directly. But the former defense secretary, now retired, has resisted such calls for additional testimony

In other words, Panetta knows who came up with the YouTube story and he doesn't want to be asked.

[RetiredTexasVet]

Send the subpoena and if he doesn’t comply, send one of the alphabet organization’s SWAT teams with the US Marshals to convince him otherwise.