The Boston Globe reports the nation’s top Iraq war contractor —- Kellogg Brown & Root -— has avoided paying hundreds of millions of dollars in federal Medicare and Social Security taxes by hiring workers through shell companies based in the Cayman Islands. More than 21,000 people working for KBR in Iraq, including over 10,000 Americans, are listed as employees of two shell companies in the Cayman Islands. Despite cheating the government of the tax money, KBR has received $16 billion in contracts in Iraq. Up until last year KBR was a subsidiary of Halliburton.