The House Intelligence Committee wrapped up on Thursday its planned schedule of public testimony in its impeachment inquiry, holding seven hearings with 12 witnesses over the past two weeks.The big picture: The committee heard hours of testimony from witnesses who were both working on the ground in Ukraine and within the Trump administration at the time of the alleged White House pressure campaign against the Ukrainian government to secure an investigation into the Biden family's business dealings.Nov. 13: Bill Taylor and George Kent's testimonyIn a new revelation, Taylor, the top U.S. diplomat in Ukraine, testified that a member of his staff overheard EU Ambassador Gordon Sondland on July 26 discussing "the investigations" on a phone call with Trump. Nov. 15: Marie Yovanovitch's testimony Trump took to Twitter as Yovanovitch, the former U.S. ambassador to Ukraine, testified to attack her diplomatic career, saying that everywhere she served "went bad." Yovanovitch said that she felt the tweets were "very intimidating" after House Intelligence Chairman Adam Schiff (D-Calif.) read them to her.Nov. 19, a.m.: Alexander Vindman and Jennifer Williams' testimonyVindman, the National Security Council's top Ukraine expert, and Williams, an aide to Vice President Pence, both used their opening statements to say that they found the July 25 call between Trump and Zelensky to be "improper" and "unusual," respectively.Nov. 19, p.m.: Kurt Volker and Tim Morrison's testimonyVolker, the former U.S. special envoy to Ukraine, was part of a group of officials who worked with Rudy Giuliani to push Ukraine to announce investigations into Trump's political rivals, though he testified Tuesday that he was not aware that the investigation would involve Joe Biden. Morrison, the former National Security Council Russia adviser, testified that Sondland informed him that nearly $400 million in military aid to Ukraine would be released if Zelensky announced the investigations.Nov. 20, a.m. Gordon Sondland's testimonySondland said that he worked with Rudy Giuliani "at the express direction" of President Trump on matters involving Ukraine. He also confirmed that a quid pro quo preconditioning a White House meeting in exchange for an investigation into the Biden family's business dealings in Ukraine took place and "reflected President Trump's desires and requirements."Nov. 20, p.m.: Laura Cooper and David Hale's testimonyCooper, a Pentagon official, testified that, after the transcript of her closed-door deposition was released on Nov. 11, members of her staff brought her two unclassified State Department emails revealing that the Ukrainian embassy was inquiring about the military aid on July 25 — the same day as Trump's call with Zelensky.Nov. 21: Fiona Hill and David Holmes' testimonyHill, Trump's former top Russia adviser, testified that a "fictional narrative" about Ukraine and a conspiracy theory alleging its interference in the 2016 presidential election, driven by partisan politics, distracted Trump from the real threat that Russia poses to America's democracy.Hill also said she had a conflict with Sondland over his claim that he was working on Ukraine policy at Trump's direction — to pursue what she termed a "domestic political errand."Go deeper ... Trump-Ukraine scandal: The key players, dates and documents