Before the end of April, the House Select Committee on Benghazi established by Speaker Boehner is planning to interview 20 current and former Obama administration officials, Chairman Trey Gowdy (R-SC) has announced

Those slated to be questioned include “former Defense Secretary Leon Panetta and former CIA director David Petraeus, as well as White House chief of staff Denis McDonough and national security adviser Susan Rice,” the Associated Press reported:

The list also includes former White House press secretary Jay Carney; Army Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff; and former national security adviser Thomas Donilon.

Gowdy has previously said he will ask former Secretary of State Hillary Rodham Clinton to testify at a public hearing before the 12-member committee. He said Friday that appearance should occur "as soon as possible." …

Gowdy also said he wants to interview Cheryl Mills, a longtime Clinton aide who was her chief of staff when the attacks occurred at the U.S. diplomatic outpost in Benghazi.

Gowdy said last week he was frustrated at the slow pace of the investigation and was going to "ratchet it up."

Democrats on the committee and President Obama’s State Department have intentionally hampered the committee’s investigation, with the administration so far failing to turn over all of Clinton’s documents, including notes and emails. Chairman Gowdy has said he will only interview her after receiving them.

Ahmed Abu Khatallah was arrested in Libya in June 2014 and charged with leading the September 11, 2012, attack on the American consulate in Benghazi. He pled not guilty in the U.S. District Court for the District of Columbia in October, and appeared in court for another hearing last month. His next hearing is scheduled for April 14. No one else has been arrested or prosecuted for the murder of Ambassador Chris Stevens, Sean Smith, Tyrone Woods and Glen Doherty.

As Speaker Boehner said nearly a year ago, the Select Committee’s investigation “is about one issue, and one issue only, and that is getting the truth for the American people and the truth about what happened in Benghazi for the four families who lost their loved ones there. … Why does the administration refuse to turn over the documents? Why do they refuse to tell the American people the truth about what happened?”

As long as those questions remain unanswered, the House’s investigation will continue.