- Walt Disney's first theme park marks its 60th anniversary on July 17
- Disneyland's success was not assured on opening day, which was plagued by mishaps
- Disney addressed the problems and the park marked 1 million visitors in seven weeks
In honor of ABC's "Disneyland 60" tribute Sunday night, we revisit CNN's 2015 story about opening day at Walt Disney's first park.
(CNN)It's the park that Walt built.