nato's secretary general, jens stoltenberg, insisted that ukraine must prevail as an independent state. now on bbc news, panorama. protection is a national security. it is everyone�*s responsibility. security. it is everyone's responsibility.— security. it is everyone's responsibility. tonight on panorama, _ responsibility. tonight on panorama, china's - responsibility. tonight on - panorama, china's crackdown on hong kong. we panorama, china's crackdown on hong kong-— panorama, china's crackdown on hong kong. we must protect our --eole hong kong. we must protect our people from — hong kong. we must protect our people from espionage, - people from espionage, terrorism, political interference and subversion. it interference and subversion. it is 25 years since britain handed back control of the city to china. back then, promises were made to protect