Boyfriend of L.A. ballerina Ksenia Karelina sentenced to prison in Russia "begging American people to help"

As Russian-American Ksenia Karelina prepares to appeal her 12-year sentence in a Russian penal colony after pleading guilty Thursday to treason, her boyfriend, Chris Van Heerden, is grappling with the harsh reality of her situation. 

"How did I end up here? How did Ksenia end up here?" he reacted to Thursday's sentencing during an exclusive interview with "CBS Mornings" co-anchor Gayle King.