almost all are connected to oil refineries similar to this one near the capitol of tripoli. they are concerned that isis will use small aircraft loaded with explosives and u.s. government officials say the concern is legitimate but add there is no evidence of credible plotting using aircraft. over the weekend, isis claimed responsibility for the horrific attacks first on the south korean embassy. the spokesman deflected questions of whether the libyan people were better off today than under the dictator. >> we're deeply concerned about the threat of terrorist groups in libya including isil