The third day of public hearings in the impeachment inquiry into President Donald Trump took place Tuesday as the Intelligence Committee in the U.S. House of Representatives held two separate hearings from high-level officials—one in the morning and one later in the afternoon.

In the afternoon, Ambassador Kurt Volker, former U.S. Special Envoy to Ukraine testified alongside Timothy Morrison, Special Assistant to the President and Senior Director for Europe and Russia at the National Security Council.

In the morning, the comittee heard testimony from Lt. Col. Alexander Vindman and Jennifer Williams. Vindman and Williams are both high-ranking members of the White House national security team in the Trump White House. Williams is a top aide to Vice President Mike Pence as special adviser for Europe and Russia in his office and Vindman is a member of the National Security Council official—director of European Affairs for the NSC and fluent in Ukraine. Both were on Trump’s controversial July 25 call with Ukraine President Volodymyr Zelensky.