referred to July 17, 1955, as "Black Sunday". After the extremely negative press from the preview opening, Walt Disney invited attendees back for a private "second day" to experience Disneyland properly. At the time, and during the lifetimes of Walt and Roy Disney, July 17 was considered merely a preview, with July 18 the official opening day. Since then, aided by memories of the television broadcast, the company has adopted July 17 as the official date, the one commemorated every year as Disneyland's birthday. 1950s and 1960s In September 1959, Soviet First Secretary Nikita Khrushchev spent thirteen days in the United States, with two requests: to visit Disneyland and to meet John Wayne, Hollywood's top box-office draw. Due to the Cold War tension and security concerns, he was famously denied an excursion to Disneyland. The Shah of Iran and Empress Farah were invited to Disneyland by Walt Disney in the early 1960s. There was moderate controversy over the lack of African American employees. As late as 1963, civil rights activists were pressuring Disneyland to hire black people, with executives responding that they would "consider" the requests. The park did however hire people of Asian descent, such as Ty Wong and Bob Kuwahara. As part of the Casa de Fritos operation at Disneyland, "Doritos" (Spanish for "little golden things") were created at the park to recycle old tortillas that would have been discarded. The Frito-Lay Company saw the popularity of the item and began selling them regionally in 1964, and then nationwide in 1966. 1970s On August 6, 1970, an estimated 300+ anti-war Yippies entered Disneyland in a planned protest against the Vietnam War. The protestors held grievances with specific aspects of the theme park itself, such as the Aunt Jemima-themed pancake restaurant in Frontierland and the park's association with Bank of America, a subject of controversy at the time for its lending to military contractors such as Boeing. The Yippies were met by an estimated 100 riot police who established lookouts within the park and another 300 on standby just outside of the entrance gates. Around 4:00 p.m., many of the Yippies occupied Tom Sawyer Island, purportedly smoking cannabis and causing cast members to halt park guests from boarding rafts to the island. An hour later, the group of Yippies converged at Main Street, U.S.A. and became confrontational with other park guests and riot police after tearing down patriotic bunting