The Bush administration will have to explain to Congress the timing and scope of its testing plan for the national missile defense system it wants to make operational in 19 months, the head of the Pentagon's missile defense programs said yesterday. Addressing a Washington, DC, conference on missile defense, Lt. Gen. Ronald Kadish, the director of the Missile Defense Agency, said that he finds the issue of testing the GMD system "kind of curious." Kadish noted that MDA has spent...