China detains U.S. seismologist who has studied North Korean nuclear tests

?A Chinese-born American seismologist who has published U.S.-funded work on detecting North Korean nuclear tests has been detained in China for nearly two years and faces trial on spying charges, according to his wife, U.S. lawmakers and two hostage advocacy groups. The case of Youlin Chen, reported here for the first time, adds an irritant to the tense relationship between the nuclear-armed rivals and comes as U.S. President Donald Trump seeks to keep the relationship steady following last year’s trade war. U.S. Secretary of State Marco Rubio on March 19 designated Chen, 54, as “wrongfully detained,” making his release a…