Silence on the Cheong Wa Dae-White House Hotline Full nine months have passed since President Roh Moo-hyun and U.S. President George W. Bush last spoke on the phone, giving rise to speculation that the two heads of state have nothing to say to each other. Their last conversation was on Sept. 20 last year, the day after six-nation talks in Beijing produced a statement of principles whereby North Korea agreed to give up its nuclear program. Roh called Bush for what was their 12th phone conversation. The Korean president was then in his 31st month in office, making for a...