EditorialFootprints left by fisherman on an algae-covered sand bank of the Mekong River near Sangkhom, Thailand on Jan. 24, 2020. (Adam Dean/The New York Times)
EditorialFootprints on an algae covered sand bank of the Mekong River, exposed by its lowered water level, near Sangkhom, Thailand, Jan. 24, 2020. (Adam Dean/The New York Times)