Letter to the Editor of The New York Times, published May 15, 1998 To the Editor: Re "Another Land Mine Retreat" (editorial, May 11): United States anti-personnel and anti-tank mines developed after the Vietnam War are self-destructing and self-deactivating (within 4 hours or 15 days). They do not, as you say, continue "to kill civilians for decades after a war ends." They are designed to eliminate the long-term humanitarian hazard and to make their retrieval for use against American forces impossible. The Ottawa Treaty signed by many nations in December 1997 does not limit anti-tank mines, which (if not self-destructing and self-deactivating) kill civilians for decades. Rather than sign the Ottawa Treaty, the Administration should adopt a policy banning anti-personnel or anti-tank land mines other than those that self-destruct or self-deactivate. It should also destroy the 9 percent of United States anti-personnel mines and the 20 percent of anti-tank mines that lack these essential features. The Administration should then push for a global treaty along the same lines. That would give Washington a leadership role in eliminating the danger to civilians posed by both anti-personnel and anti-tank land mines. {, while protecting our military personnel.} RICHARD L. GARWIN New York, May 13, 1998 The writer is a senior fellow at the Council on Foreign Relations. (Published in The New York Times, May 15, 1998, with the text in "{...} deleted by the editor)