Washington (AFP) – A US Navy nuclear engineer and his wife were sentenced to long prison terms on Wednesday for plotting to sell submarine secrets to a foreign country. Jonathan Toebbe, 44, and his wife, Diana Toebbe, 46, pleaded guilty in February to conspiring to sell information related to naval nuclear propulsion systems. Jonathan Toebbe was sentenced to 19 years and three months in prison while his wife, Diana Toebbe, 46, received a prison term of 21 years and eight months, the Justice Department said. According to court documents, Diana Toebbe acted as a lookout while her husband deliver…