UNINEW YORK—Dag Hammarskjold, secretary general of the United Nations, and Lewis L. Strauss, chairman of the Atomic Energy Commission, will be among the principal speakers at the American Jewish Committee’s five-day 50th anniversary gbservance which ends here Sunday.Jacob Blaustein of Baltimore, planning committee chairman, announced that the theme of the Observance is “The Pursuit of Equality at Home and Abroad.” He saidthe meeting, which will bring together more than a thousand communal leaders from 600 communities throughout the country, willfocus chiefly on:PROSPECTS for American equality in economic, social, and educational spheres. .Role of American religious institutions in promoting inter groupamity. .United States and the MiddleEast.Status of Jewish communities in the United States and throughoutthe world. .Challenge of the half centuryahead in realizing the promise in-herent for all Americans of theAmerican documents of freedom.THE AMERICAN Jewish Committee, which was founded in the wake of the Kishinev pogroms in 1906, is the oldest American organ-Chiefs To Speakof freedom everywhere. jiieias wm hBlaustein said that in addition to ference.dag hammarskjoldLEWIS L STRAUSSBitsNews, A dutv-free gift shop was opened Beth El Congregation will elect ^ Mrport as a further in-nffirers at a general membership y in-hunters” to