In pictures: Immigration and Border Security issues loom heavy in upcoming US elections

US Border Patrol opens a park on the American side in San Diego on weekends to meet through the fence with family and friends through the fence at Tijuana.
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People meet loved ones through the U.S.-Mexico border fence on September 25, 2016 in Tijuana, Mexico. The U.S. Border Patrol opens the park on the American side in San Diego on weekends to meet through the fence with family and friends through the fence at Tijuana. The park is one of the few places on the 2,000-mile border where separated families are allowed to meet. (John Moore/Getty Images)
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A girl meets family members through the U.S.-Mexico border fence on September 25, 2016 in Tijuana, Mexico. U.S. Border Patrol agents allow people into San Diego's 'Friendship Park' on weekends to meet through the fence with family and friends on the Mexican side. The park is one of the few places on the 2,000-mile border where families, many of them separated by deportations, are allowed to meet. (John Moore/Getty Images)
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Maria Rodriguez Torres, 70, looks towards her departing grandchildren after seeing them for the first time at the U.S.-Mexico border fence on September 25, 2016 in Tijuana, Mexico. She had travelled with family members from Mexico City to see her grandchildren through the fence at 'Friendship Park.' The U.S. Border Patrol opens the park on the American side in San Diego on weekends to meet through the fence with family and friends through the fence at Tijuana. The park is one of the few places on the 2,000-mile border where separated families are allowed to meet. (John Moore/Getty Images)
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Carlos, who lived in Los Angeles 28 years undocumented before being deported to Mexico, kisses his wife through the meshed U.S.-Mexico border on September 25, 2016 in Tijuana, Mexico. U.S. Border Patrol agents allow people into San Diego's 'Friendship Park' on weekends to meet through the fence with family and friends on the Mexican side. The park is one of the few places on the 2,000-mile border where families, many of them separated by deportations, are allowed to meet. (John Moore/Getty Images)
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Carlos, who lived in Los Angeles 28 years undocumented before being deported, speaks through the U.S.-Mexico border fence to his wife and daughter on the American side on September 25, 2016 in Tijuana, Mexico. U.S. Border Patrol agents allow people into 'Friendship Park' on weekends to meet through the fence with family and friends on the Mexican side. The park is one of the few places on the 2,000-mile border where families, many of them separated by deportations, are allowed to meet. (John Moore/Getty Images)
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Carlos, who lived in Los Angeles 28 year’s undocumented before being deported, speaks through the U.S.-Mexico border fence to his wife and daughter on the American side on September 25, 2016 in Tijuana, Mexico. U.S. Border Patrol agents allow people into 'Friendship Park' on weekends to meet through the fence with family and friends on the Mexican side. The park is one of the few places on the 2,000-mile border where families, many of them separated by deportations, are allowed to meet. (John Moore/Getty Images)
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A man meets family members through the meshed U.S.-Mexico border fence on September 25, 2016 in Tijuana, Mexico. U.S. Border Patrol agents allow people into San Diego's 'Friendship Park' on weekends to meet through the fence with family and friends on the Mexican side. The park is one of the few places on the 2,000-mile border where families, many of them separated by deportations, are allowed to meet. (John Moore/Getty Images)
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Immigrant activists pray at the U.S.-Mexico border fence on September 25, 2016 in Tijuana, Mexico. The U.S. Border Patrol opens the park on the American side in San Diego on weekends to meet through the fence with family and friends through the fence at Tijuana. The park is one of the few places on the 2,000-mile border where separated families are allowed to meet. (John Moore/Getty Images)