In 1975 a demolition crew was at work in central Israel, clearing away the remains of an old kibbutz at the top of Kibbutz Hill. When several members of the demo team wrestled aside a large rusted clothes washer, they revealed a small entryway that seemed to lead below ground. Bulldozers shut down their engines, cranes froze in place as members of the team looked down into the hole. What they saw, what they discovered had been kept secret, hidden for three decades.