invasion of poland, which started world war ii. several world leaders including vice president mike pence also in attendance. >> we'll continue to stand with all of our allies for our common defense. america and poland will also continue to call on our allies to live up to the promises that we've made to one another. connell: during the predawn hours, on september 1, 1939, nazi ships opened fire on a port on what is now poland, france, u.k. declared war on germany two days later. a surge of pro democracy demonstrators blocking off streets outside of hong kong's airport today. today's disruption comes after a weekend of aggressive clashes between these protesters and the police. jonathan hunt has been covering it. he joins us now live on a monday morning from hong kong.