An American think tank says North Korea's preparations for a planned rocket launch may have been delayed by heavy snow.
The US-Korea Institute at Johns Hopkins University said Friday that new satellite imagery suggests preparations at the Sohai satellite launch station are proceeding "more slowly than previously reported."
Nick Hansen, an expert on imagery analysis, wrote on the institute's website that images taken on Tuesday showed no tracks in heavy snow at the launch site.
However, Hansen said that, even with weather delays, the North could finish its preparations on schedule.