WASHINGTON, May 25 (AFP) - The White House vowed Tuesday to tighten controls on the export of sensitive technologies after a congressional report said China stole US nuclear weapons secrets. "We look forward to working with Congress on any necessary additional measures to strengthen protections and export controls," the White House said in a statement that coincided with report's publication. The White House said it did not agree with all of the report's analysis, but stressed it shared with Congress the goal of protecting US national secrets and preventing diversion of civilian technology to military purposes. "We found most of the recommendations constructive, and we are in the process of implementing them," the White House said.  