The United States will prohibit its citizens from traveling to North Korea as tourists starting from late next month, tour operators said Friday, amid high tensions between the two countries.The decision is expected to be announced by the U.S. government next Thursday and the ban is likely to become formally effective 30 days later, Simon Cockrell, general manager of Koryo Tours, a Beijing-based travel agency that organizes North Korea tours, told Kyodo News.He said the company was informed in the afternoon of the new policy by the Swedish Embassy in Pyongyang, which represents U.S. interes…READ FULL ARTICLE