Cyprus on Saturday marked the 50th anniversary of the bloody invasion of the Mediterranean island by Turkish troops with both sides as divided as ever over the territory’s future. As Greek Cypriots mourned those killed and still missing since the 1974 convulsion of violence, Cypriot President Nikos Christodoulides said there was no other option but reunification. Cyprus joined the European Union in 2004 still divided after Greek Cypriots overwhelmingly rejected a UN plan to end their differences with Turkish Cypriots. But in an address on the other side of the UN-patrolled buffer zone which se…