International sanctions impeded international trade to some degree, many related to North Korea's development of weapons of mass destruction. United States President Barack Obama approved an executive order in April 2011 that declared "the importation into the United States, directly or indirectly, of any goods, services, or technology from North Korea is prohibited". Operational sanctions included United Nations Security Council Resolutions 1695, 1718, 1874, 1928, 2087, and 2094. Reports in 2018 indicated that trade sanctions (bans on almost all exports and the freezing of overseas accounts) were seriously affecting the economy. The main paper Rodong Sinmun was running short of paper and was publishing only a third of its normal print run, two energy plants supplying electricity to Pyongyang had to be shut down intermittently due to lack of coal, causing blackouts, coal mines were operating under capacity due to lack of fuel, coal could not be transported due to lack of fuel and food rations had been cut by half.