North Korea has carried out at least 2 rocket fuel tests since April , it says . It has commercial satellite imagery that shows tests at a launch site . A failed rocket test by the North in April scuppered a military aid agreement with the U.S . The unsuccessful satellite launches in 2006 and 2009 were both followed weeks or months later by nuclear tests . The academic website sees the possibility of rocket and nuclear tests in 2013 .
North Korea has carried out at least 2 rocket fuel tests since April , it says . It has commercial satellite imagery that shows tests at a launch site . A failed rocket test by the North in April scuppered a military aid agreement with the U.S . The academic website sees the possibility of rocket and nuclear tests in 2013 .