[An Egyptian military search boat takes part in a search operation for the EgyptAir plane that disappeared in the Mediterranean Sea]By Lin Noueihed and George Georgiopoulos CAIRO/ATHENS (Reuters) - An EgyptAir jet carrying 66 passengers and crew from Paris to Cairo disappeared from radar over the Mediterranean on Thursday in what Egypt said could have been a terrorist attack. The Egyptian civil aviation ministry initially said Greek authorities had found "floating material" and life jackets likely to be from the plane, an Airbus A320. An official from the Egyptian civil aviation ministry said Egypt, Greece, and France were all involved in the search for the plane.