The first public hearing of the Benghazi Select Committee, chaired by Rep. Trey Gowdy (R-SC), is scheduled for Sept. 17. On America's Newsroom this morning, Eric Shawn talked to attorney Victoria Toensing, who has participated in the congressional investigations into the attack that killed four Americans two years ago.

He asked her how this investigation might be different than previous hearings and inquiries on Capitol Hill into the attack. Toensing explained that past hearings have been "unmanageable" because there are 40 committee members, and each gets only five minutes for questions.

She lamented that instead of following up on the questioning of a witness, the next committee member often went down their own path, with Democrats failing to ask any tough questions.

Toensing pointed out that there were also four different committees investigating and they weren't always sharing information with each other. She said Gowdy's committee will now be able to centralize the investigation and is a manageable size, with seven Republicans and five Democrats.

Shawn asked whether we'll learn anything new about what President Obama and Hillary Clinton were doing while the attack was unfolding and how key decisions were made.

Toensing believes the former secretary of state will have to reveal more than she has previously because she can be questioned "for hours" in depositions.

"She's got to answer those questions or they can wait til the cows come home. ... It's a new world on how they're gonna approach it," said Toensing.

Watch the full segment.