On a recent day, the sidewalk school in Matamoros, Mexico, began with arts and crafts. Reynaldo Leaños Jr. /Texas Public Radio hide caption
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Wisconsin Gov. Tony Evers, pictured earlier this month, issued an executive order on Monday recalling all National Guard and airmen troops from the U.S.-Mexico border. Jose Luis Magana/AP hide caption
A Marine uses concertina wire to fortify the border separating Tijuana, Mexico, and San Diego, near the San Ysidro Port of Entry. Gregory Bull/AP hide caption