As the Russian invasion of Ukraine continues, there are growing concerns over Russia's nuclear threats. Congresswoman Jackie Speier breaks down why declaring a no-fly zone could greatly escalate the conflict and says the U.S. and Russia have a similar amount of large-scale nuclear weapons. Subscribe to KTVU's YouTube channel: / @ktvufox2 KTVU delivers the best in-depth reports, interviews and breaking news coverage in the San Francisco Bay Area and California Watch KTVU's newscasts on https://www.ktvu.com/live Download KTVU's news and weather apps for free at https://www.ktvu.com/mobile-apps Subscribe to KTVU's newsletter at https://www.ktvu.com/newsletters Follow KTVU on Facebook: / ktvu Follow KTVU on Twitter: / ktvu Follow KTVU on Instagram: / ktvu2