Reading Time: 0 1 Who is the United States Soo Bahk Do Moo Duk Kwan Federation® suing?Reading Time: 1 International Tang Soo Do Moo Duk Kwan Association a.k.a Tang Soo Karate School, Inc. and Robert Kovaleski and Eric Kovaleski. Soo Bahk Do Federation   11/04/2016  Been Inactive For Years And Want To Start Training Again.