SEOUL, Feb. 3 (UPI) -- Hundreds of North Korean soldiers were seen practicing marching formations in preparation for a possible military parade ahead of the country's long-anticipated Ninth Party Congress, according to a new report. Recent commercial satellite imagery shows large formations of troops conducting drills at the Mirim Parade Training Ground in east Pyongyang, analysts at the Stimson Center-based 38 North said in an assessment published Monday. The activity is "likely in preparation