A group of children are now carrying large British and Greek flags.
Greek president Karolos Papoulias is accompanied by Spyros Capralos, the president of the Hellenic Olympic Committee.
More top news
A baby who was unable to tell which of two identical twin brothers was his father has been watched millions of times online.
Ewan Williamson,14, died from heatstroke in Australia after police took almost an hour to respond to his distress call, an inquest heard.
Explosives and suicide vests have been seized from a group of suspects stopped on Turkey's border with Syria, the Turkish army has said.