Senator Mark Warner (D-VA) joins Katy Tur to discuss the significance of Poland saying it struck down Russian drones, threats to U.S. intelligence and Israel striking Yemen just after targeting senior Hamas officials in Qatar. Our next MSNBC Live event is on October 11th in New York City! Buy Tickets Now: msnbc.com/live25 For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: https://www.youtube.com/msnbc » Subscribe