Twenty years ago, beloved NBC journalist David Bloom passed away from a pulmonary embolism while embedded with American troops in Iraq. His widow Melanie joins TODAY to talk about her 20-year mission to raise awareness about blood clots. She is joined by Dr. Geoff Barnes to discuss risk factors. » Subscribe to TODAY: on.today.com/SubscribeToTODAY » Watch the latest from TODAY: bit.ly/LatestTODAY About: TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: on.today.com/ReadTODAY Find TODAY on Facebook: on.today.com/LikeTODAY Follow TODAY on Twitter: on.today.com/FollowTODAY Follow TODAY on Instagram: on.today.com/InstaTODA...