By Steve Gutterman MOSCOW (Reuters) – Former U.S. spy agency contractor Edward Snowden's father arrived in Moscow on Thursday to see his son, who was granted asylum in Russia after he leaked details of government surveillance programs and fled the United States. Speaking at the same Moscow airport where his fugitive son was stranded for weeks this summer, Lon Snowden said he had no direct contact with Edward Snowden but that he felt "extreme gratitude that my son is safe and secure and he's free". …