Query: When did Eisenhower sign the law to create the Interstate Highway System?
Context: Noticing the improved ability to move logistics throughout the country, he thought an Interstate Highway System in the U.S. would not only be beneficial for military operations, but provide a measure of continued economic growth. The legislation initially stalled in the Congress over the issuance of bonds to finance the project, but the legislative effort was renewed and the law was signed by Eisenhower in June 1956.