 Thousands of Disneyland employees will vote today on whether to authorize a strike. The four unions that have been a part of ongoing negotiations collectively represent about 14,000 employees or cast members. They filed several unfair labor practice charges against the theme park in May, claiming employees were unlawfully disciplined for wearing union buttons at work. For the past three months, the unions have been trying to negotiate a new contract with Disney. They're demanding higher wages and safety improvements.