Russia is blaming Ukraine for a truck bomb that caused a major fire to erupt on the only bridge linking Russian-annexed Crimea to Russia. Authorities say part of the bridge collapsed. CBS News correspondent Charlie D’Agata is in Ukraine with the latest. "CBS Saturday Morning" co-hosts Jeff Glor, Michelle Miller and Dana Jacobson deliver two hours of original reporting and breaking news, as well as profiles of leading figures in culture and the arts. Watch "CBS Saturday Morning" at 7 a.m. ET on CBS and 8 a.m. ET on the CBS News app. Subscribe to "CBS Mornings" on YouTube: https://www.youtube.com/CBSMornings Watch CBS News live: https://cbsn.ws/1PlLpZ7c​ Download the CBS News app: https://cbsn.ws/1Xb1WC8​ Follow "CBS Mornings" on Instagram: https://bit.ly/3A13OqA Like "CBS Mornings" on Facebook: https://bit.ly/3tpOx00 Follow "CBS Mornings" on Twitter: https://bit.ly/38QQp8B Subscribe to our newsletter: https://cbsn.ws/1RqHw7T​ Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: [email protected]