A Senate panel on Friday morning will hear from a high-level Pentagon delegation about the Libyan military intervention.
The Senate Armed Services Committee is slated to hear from Undersecretary of Defense for Policy Michele Flournoy, the Pentagon's No. 3 civilian, and other top military officials.
The briefing comes amid lingering irritation on Capitol Hill about the Obama administration's decision to intervene in Libya, and what members of both parties say was its lack of congressional notification.
Months into the campaign, Libyan leader Moammar Gadhafi remains in power.
Leon Panetta, the CIA director tapped as the next Defense secretary, told the same Senate panel there are signs Gadhafi and his regime are weakening.
Polls show the American public is largely skeptical of the operation and its costs.