DACA recipient and electrical engineering student Brian Caballero, 25, works on a circuit board for his lab class in Pomona, California, U.S., January 25, 2018. Caballero is an electrical engineering undergraduate student in his last year of Cal Poly Pomona University. He came to the U.S. when he was five or six years old from Guadalajara, Mexico. Caballero said he was worried about losing DACA: "When I finally graduate, not being able to be employed, terrifies me... The vast majority of people who are unauthorised in this country are here to have a better life... the majority of people are like me: here, trying to seek an education and just trying to improve their lives." REUTERS/Lucy Nicholson REUTERS/Lucy Nicholson SEARCH "USA DREAMERS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.