The Walker Art Center's second-in-command resigned abruptly Thursday, . . .
[Ann] Bitter oversaw the Walker's construction project and its budget. She also helped the center shape a future schedule that tries to balance avant-garde events with more mainstream shows, performances and films. As examples of events with "very strong public appeal" she cited planned shows of Frida Kahlo paintings, Diane Arbus photos and "Picasso in America."
