Ukraine bans all trade with rebel-held territory, as separatists seize assets

By Pavel Polityuk and Alexei KalmykovKIEV (Reuters) - Ukrainian authorities on Wednesday halted all cargo traffic with rebel-held territory in the east of the country, formalizing an existing rail blockade by Ukrainian activists that has fueled the worst political crisis in nearly a year.In a standoff that is hurting the economies of both sides, separatists have seized control of strategic Ukraine-registered industries in their territory in response to the rail blockade, which has cut off coal a