Botanists and citizen scientists armed with the iNaturalist app on their smartphones record the biodiversity along the U.S.-Mexico border as bright yellow blooms carpet the ground, a sharp contrast to the imposing steel bollards of the border wall topped with rolls of razor wire along the US Mexico border on Friday, April 19, 2024, as members of the California's Baja Rare project lead a botanical expedition with college students to document native plants along the US Mexico border on Friday, April 19, 2024, near the Ejido Jacume in the Tecate Municipality of Baja Calif., Mexico. (AP Photo/Damian Dovarganes)