. as the house select committee investigates the deadly pro-trump riot at the capitol, we're getting a new look into what led to his first impeachment. retired lieutenant colonel alexander vindman, the star witness who testified to congress about the critical phone call between trump and ukraine a president is now telling the story on his own terms. his powerful testimony in 2019 detailing how the then-president pressured ukraine to investigate joe biden and why he felt it was his duty to come forward. >> dad, i'm sitting here today in the u.s. capitol, talking to our elected professionals is proof that you made the right decision 40 years ago to leave the soviet union and come here to the united states of america in search of a better life for our family. do not worry. i will be fine for telling the truth. this is america. this is the country i've served