(AGI) Maan, June 28 - Amman is on maximum alert over a possibleattack by jihadists of the Islamic State of Iraq and Syria(ISIS). There are fears that ISIS will manage to penetrateJordan after an Iraq-Jordan checkpoint was seized. Twodemonstrations were held this week in Maan, 250 kilometres fromJordan, where ISIS black flags were seen flying for the firsttime. . .