[ad_1] LOS ANGELES — Final fall, Iuliia Shuvalova and Sergei Ignatev, a younger Russian couple, offered their automotive and took out a mortgage to pay for a vacation at a seaside resort on Mexico’s Riviera Maya.However they weren’t occurring trip. And they didn’t intend to return to Russia.As soon as in Cancun, the couple bought flights to Tijuana, a metropolis simply throughout the border from San Diego, and stayed there simply lengthy sufficient to purchase a used automotive with a California license plate. At 4 a.m. on Dec. 2, they joined a line inching towards the U.S. border station of…