Mr. President. last week various individuals whose identities are still unknown. entered two Palestinian refugee camps in Beirut. Shatila. and Sabra. There. under circumstances which at best are unclear and at worst are unthinkable. they murdered an uncounted number of innocent men. women. and children. The full dimensions of the tragedy are not yet known. nor are all the factors which led up to it or all the circumstances which contributed to it. It is that uncertainty which is so destructive. Without firm data. speculation has poisoned the environment and polluted our discussions of these tragic events. There is no evidenceno evidencesuggesting that Israeli troops participated directly in the slaughter.