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The Greek prime minister Alexis Tsipras has resigned, in a move expected to trigger elections for voters to give their verdict on the country's latest bailout deal. North Korea says it's put its troops on a war footing, following an exchange of fire with the South on Thursday. We tackle your gadget gremlins in our regular technology phone-in. Friends and fans of the singer and TV presenter Cilla Black have joined her family at her funeral in her home city of Liverpool. And why facepalm, selfie and bacon are in the running to become new emoji characters next year.