During lectures he gave at schools, corporations, clubs, universities, and a jail on both sides of the international border between Tijuana and San Diego, Paul Ramírez Jonas spoke about space and how we define it as locked or unlocked. Each of these eleven talks was followed by an exercise in trust: audience members were invited to exchange keys with the artist and each other. Ramírez Jonas began the exercise by using the displayed key duplicating machine to create a copy of the key to the front door of his home, which he gave to the next participant; that individual’s key was then copied and offered to the third participant, and so on until the final key was made and offered to the last person in the line.