Russian President Vladimir Putin has accepted an invitation to visit North Korea, Pyongyang's state-run KCNA news agency said on Thursday. North Korean leader Kim Jong Un extended the invitation to Putin after attending the Eastern Economic Forum in Vladivostok. "Putin accepted the invitation with pleasure and reaffirmed his will to invariably carry forward the history and tradition of the Russia-DPRK friendship," KCNA said. Earlier, on Wednesday, Kim vowed Pyongyang's "full and unconditional support" for Russia's invasion of Ukraine. North Korean state media said the two leaders leaders committed themselves to a "common front to frustrate the imperialists' military threat and...