Susan Campbell of Narbeath, Penn., holds signs reminiscent of a World War II poster during a demonstration near the White House in Washington Sunday, June 10, 2001 opposing the Bush administration's proposed national missile defense plan. President Bush is scheduled to leave Washington for Europe Monday where he plans talk with American allies about the plan. (AP Photo/Rick Bowmer) 

Dr. Peter Wilk, former president of Physicians for Social Responsibility, left, accompanied by Martin Bucher, refers to a petition on Capitol Hill Tuesday, June 12, 2001, signed by 10,000 members of PSR and others to urge members of Congress to oppose the Bush administration's National Missile Defense program. The umbrella is PSR's favorite analogy representing the NMD program which would let in about 1/10 of the missiles launched toward the US. (AP Photo/Ken Cedeno) 

Protesters opposed to the Bush administration's proposed national missile defense plan demonstrate near the White House Sunday, June 10, 2001 in Washington. President Bush is scheduled to leave Washington for Europe Monday where he plans talk with American allies about the plan. (AP Photo/Rick Bowmer) 

With a mock missile behind her, Libby Marsh of Philadelphia, Penn., stands in Lafayette Park across from the White House in Washington Sunday, June 10, 2001, during a demonstration opposing the Bush administration's proposed national missile defense plan. President Bush is scheduled to leave Washington for Europe Monday where he plans talk with American allies about the plan. (AP Photo/Rick Bowmer)