They also totally missed India's second round of nuclear weapon development and were blindsided by the tests:

U.S. Intelligence and India's Nuclear Tests: Lessons Learned

  August 11, 1998 98-672

  The U.S. Intelligence Community did not have advance knowledge that India intended to conduct nuclear tests beginning on May 11, 1998.

  Although intelligence agencies cannot have foreknowledge of every significant development in world affairs, many observers (and senior intelligence officials) believe that, in view of the election of an Indian government committed to "inducting" nuclear weapons, much greater attention should have been given to indications of impending nuclear tests