From Al Jazeera. Any opinions expressed are those of the authors, and do not necessarily reflect the views of Libya Business News.
The FBI has identified five men it believes were involved in last year's deadly attack on the US consulate in Benghazi.
Washington has not officially asked the Libyan government to apprehend the men, but Al Jazeera has learned that US officials have tried to get powerful armed groups to co-operate.
The US initially said that the violence was in response to a video posted online that was insulting to Islam, however recent evidence suggests it was a planned attack.
Al Jazeera speaks to David Mack, former US ambassador to Libya, on the US attempt to find the Benghazi attackers.
He says it will not be easy for the Libyan government to arrest and try the FBI suspects:
