white students in Orange County was widespread in the mid 1940s, with 80% of Mexican students attending 14 segregated schools. These schools taught Mexican children manual education – or gardening, bootmaking, blacksmithing, and carpentry for Mexican boys and sewing and homemaking for girls – while white schools taught academic preparation. The landmark case Mendez vs. Westminster (1947) desegregated Orange County schools, after the Mendez family were denied enrollment into the 17th Street School in Westminster in 1944, despite their cousins with lighter skin being admitted, and were instead told to enroll at the Hoover Elementary School for Mexican children. In the 1950s, agriculture, such as that involving the boysenberries made famous by Buena Park native Walter Knott, began to decline. However, the county's prosperity soared during this time. The completion of Interstate 5 in 1954 helped make Orange County a bedroom community for many who moved to Southern California to work in aerospace and manufacturing. Orange County received a further economic boost in 1955 with the opening of Disneyland. In 1969, Yorba Linda-born Orange County native Richard Nixon became the 37th President of the United States. In the late 1970s, Vietnamese and Latino immigrants began to populate central Orange County. In the 1980s, Orange County had become the second most populous county in California as the population topped two million for the first time. In the 1990s, red foxes became common in Orange County as a non-native mesopredator, with increasing urban development pushing out coyote and mountain lion populations to the county's shrinking natural areas. In 1994, an investment fund meltdown led to the criminal prosecution of treasurer Robert Citron. The county lost at least $1.5 billion through high-risk investments in bonds. The loss was blamed on derivatives by some media reports. On December 6, 1994, the County of Orange declared Chapter 9 bankruptcy, from which it emerged on June 12, 1996. The Orange County bankruptcy was at the time the largest municipal bankruptcy in U.S. history. Land use conflicts arose between established areas in the north and less developed areas in the south. These conflicts were over issues such as construction of new toll roads and the repurposing of a decommissioned air base. El Toro Marine Corps Air Station was designated by a voter measure in 1994 to be developed into an international airport to complement the existing John Wayne Airport. But subsequent voter initiatives and court actions have