20 days that shaped 2019

Dec. 18: Donald Trump became just the third president in American history to be impeached by the House on abuse of power and obstruction of justice charges. A trial in the Senate is expected in 2020.

Dec. 11 – Sixteen-year-old climate change activist Greta Thornburg speaks at the United Nations Climate Change conference in Madrid, Spain. She was named Time's person of the year for standing up to world leaders on the issue.

October 31 - ISIS releases an audio message confirming the death of leader Abu Bakr al-Baghdadi and announcing its new leader is Abu Ibrahim al-Hashimi al-Qurashi.

September 3 - The Pentagon diverts $3.6 billion in military construction funds to build Trump's US-Mexico border wall.

September 1 - Hurricane Dorian strengthens to a Category 5 hurricane and makes landfall in the Bahamas. At least 61 people are killed, houses are destroyed and countless residents are left homeless.

August 31 - After being pulled over by Texas troopers for failing to use his signal, Seth Ator, 36, shoots at the police and then speeds away. Ator hijacks a mail truck and drives around randomly shooting at residents and motorists, killing seven and wounding 25 others. Ator is killed during a shootout with police.

August 4 - A mass shooting in Dayton, Ohio. The gunman, 24-year-old Connor Betts, opens fire in a popular nightlife district, killing nine people.

April 15 - A massive fire at Notre Dame Cathedral in Paris burns large parts of the 850-year-old church.

March 7 - Lobbyist and former Trump campaign chairman Paul Manafort is sentenced in Virginia to 47 months in prison for bank fraud, filing false tax returns and failure to file reports of foreign bank and financial accounts.

February 15 - Trump declares a national emergency to allocate funds to build the wall on the border with Mexico. During the announcement, the president says he expects the declaration to be challenged in court. The same day, Trump signs a border security measure negotiated by Congress, with $1.375 billion set aside for barriers, averting another government shutdown.

January 25 - A 35-day government shutdown ends when President Donald Trump signs a short-term spending measure, providing three weeks of stopgap funding while lawmakers work on a border security compromise. The bill does not include any funding for his border wall.