Will Mr Trump heed the advice of his newest chief of staff, John Kelly? Maybe in the short-term, says Jon Fasman, but even the best generals cannot discipline their commander-in-chief. Also, why China is radically overhauling its military policy. And you can now learn High Valyrian, a language from the series “Game of Thrones”, through an app. Can it help our Johnson columnist, Lane Greene, achieve fluency? We put him to the test. Josie Delap hosts.