EVER since he assumed charge as the CBI director on August 1, Joginder Singh has been hopping from one embarrassing minefield to another. First it was his widely reported meeting with former prime minister P.V. Narasimha Rao which raised many eyebrows. Close on its heels came the fiasco of his first foreign assignment as CBI chief when he failed to secure the extradition of hawala accused Amir Bhai from Hong Kong.