Cousins adopted from Korea in the early 70's

HI,

My uncle had two children (i belive they were boys) in the late 60's & early 70's. They lived in the southern part of Korea, either Masan or Pusan. My uncles last name is SOHN. Unfortunately, i don't have the details of the adoption. I was just told that they were adopted and sent to the US. I live in California now. I know that this is vague but if this sounds somewhat similar to you, let me know. I might have some information for you.