WASHINGTON, Over 200 physicians who have served U.S. soldiers have signed a letter to U.S. senators protesting a Senate bill amendment that would use U.S. military medical facilities as abortion clinics. The 16,000-member Christian Medical Association organized the letter and today sent it to the senators urging them to vote no on a National Defense Authorization Act amendment by Sen. Roland Burris that would remove restrictions on performing abortions in military facilities.