Steam seeps up through the ground in Centralia, Pa., on Jan. 13. The steam is caused by a fire that began in 1962 at the town dump and ignited an exposed coal vein, eventually forcing an exodus of more than 1,000 people, nearly the entire population of the mountain town. After years of delay, state officals are trying to finish their demolition work in Centralia. Carolyn Kaster/AP
Todd Domboski in Centralia, Pa., looks over a barricade at a hole he fell through hours earlier in 1981. The hole was caused by a mine fire that was burning since 1962. AP/FILE
Retired Centralia Postmaster Tom Dempsey is seen with Centralia, Pa. behind him as steam continues to rise out of the ground. Carolyn Kaster/AP
Centralia, Pa., is seen here on Jan. 13, 2010. Carolyn Kaster/AP
A sign on the entrance of the Centralia Municipal Building in Centralia, Pa., reads 'Keep Centralia on the map.' Carolyn Kaster/AP
A wooden painted heart with the words 'To Centralia with love, from Kingston, N.Y.,' is seen in an open lot in Centralia, Pa., on Jan. 13. Carolyn Kaster/AP
In 1981, the US Bureau of Mines' John Stockalis (r.) and Dan Lewis drop a thermometer through a hole on Main Street in Centralia, Pa., to measure the heat from a shaft mine blaze that burns under the town. Paul Vathis/AP/FILE
Smoke rises from the ground in Centralia, Pa., where a mine fire continues to rage in 1983. Rusty Kennedy/AP/FILE
Retired Centralia Postmaster Tom Dempsey is seen in his Girardville, Pa. home on Jan. 13. Dempsey lived and worked in Centralia for over 29 years. Carolyn Kaster/AP
Those who filed by ranged from committed opposition activists to ordinary citizens young and old.
ByLaura Mills, Associated Press
One by one, thousands of mourners and dignitaries filed past the white-lined coffin of slain Kremlin critic Boris Nemtsov on Tuesday, many offering flowers as they paid their last respects to one of the most prominent figures of Russia's beleaguered opposition.