i picked up a couple of pieces of lead sulfite in the graham mine and kept them on my desk.and a few years later in the spring of 1969, i know that -- i learned that michael, my boss' son, this young kid, had been kill on hamburger hill when a rocket-propelled grenade had struck him in the chest and killed him immediately. i told these north seat9 ma news soldiers about him, and i pulled out of my pocket a piece of lead sulfite of galena that i brought over there with me. and i said i'm going to bury this hill -- this here. i'm going to bauerly this on -- bury this on the top of this hill where my young friend never reached the top. but now a piece of his hometown was here, and i assured them that this lead from galena, this lead sulfite would last as long as the red clay would last. in many ways in that brief moment on that isolated, hot, humid, triple-canopied, quiet hilltop in vietnam, my research, my personal biography, my commitment to working with and supporting veterans and to remembering those who died, my scholarly focus, my personal interests, they all overlapped.