BENGHAZI, Libya (Reuters) - Gunmen shot dead a Libyan marine colonel on Wednesday in the eastern city of Benghazi where militants have increasingly targeted security forces in a challenge to central government control.
Libya has struggled to curb rival armed factions in Benghazi, where the 2011 revolt that overthrew Muammar Gaddafi began and where the U.S. ambassador was killed during an Islamist assault on a U.S. diplomatic mission a year ago.
