“Precious things lost are transmutable. They refuse oblivion.” When I was eleven years old, I did an unforgivable thing: I set my family photos on fire. We were living in Saigon at the time, and as Viet Cong tanks rolled toward the edge of the city, my mother, half-crazed with fear, ordered me to get rid of everything incriminating. Obediently, I removed pictures from the album pages, diplomas from their glass frames, film reels from metal canisters, letters from desk drawers.