Associated Press
The scenes are a daily reminder that San Diego became the busiest corridor for illegal crossings in April, according to U.S. figures, the fifth region to hold that distinction in two years in a sign of how quickly migration routes are changing. San Diego was the busiest Border Patrol sector for decades until more enforcement pushed migrants to the desert area near Tucson, Arizona, which became the top spot by 1998. Migrants were arrested nearly 128,900 times on the Mexican border in April, U.S. Customs and Border Protection said Wednesday, down 6.3% from March and barely half of a record-high 250,000 in December.