Sinai Jihadi group says responsible for Israel attack in June Ismailia | Sat Jul 28, 2012 3:02pm EDT (Reuters) - An Islamic Jihadi group based in Egypt's Sinai has posted a video showing it carried out a cross-border attack in June, killing one Israeli at a border barrier construction site and raising doubts over Egypt's security control over the desert peninsula. Since the overthrow of U.S.-aligned Egyptian President Hosni Mubarak in February 2011, the security grip has loosened over Sinai and groups of militant Islamists have spread across its northern part, attacking police stations and a pipeline exporting gas to...