This was deemed particularly appropriate by Congress since the space program had begun under Eisenhower’s administration. The reverse design of the coin was based on the Apollo 11 mission insignia, which had been designed by astronaut Michael Collins. The inscription “LIBERTY” appears above the portrait, with “IN GOD WE TRUST” to the left, and the date below. The obverse bore a profile bust of Eisenhower created by Gasparro after studying 30 pictures of the former President as well as a drawing he had made in 1945 after catching a glimpse of Eisenhower at a parade. The Chief Engraver of the United States Mint Frank Gasparro would design both the obverse and reverse of the new coin. A modified bill was eventually passed on December 31, 1970, which provided for the dollar coins to be struck in copper-nickel clad for circulation and 40% silver for collectors. There was some debate as to whether the coins should be struck in the 40% silver composition which had been used for the half dollar or the copper-nickel clad composition used for quarter and dime. Eisenhower and the Apollo 11 space flight, which marked man’s first steps on the moon. The legislation sought to authorize a circulating dollar coin to commemorate recently deceased former president Dwight D. The first legislation to create a new dollar coin at the conclusion of the five-year period was introduced in October 1969.