Interested in photography? Looking for something to do on your break, or hoping to stretch your legs during lunch? Come to the Colby Museum on Tuesday, March 20and join exhibition curators for a half-hour discussion of photographs from the collection. Taking its name from the Alfred Stieglitz photograph on view in the exhibition, City of Ambition not only examines urban spaces but also looks beyond them to consider the resources and infrastructures which serve and sustain them. Photographers featured include Manuel Álvarez Bravo, Berenice Abbott, Imogen Cunningham, and Richard Misrach.