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Interactive: Ryan McLarty/QMI Agency. Photos: Reuters
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Gunmen flee the offices of French satirical newspaper Charlie Hebdo in Paris, in this still image taken from amateur video shot on January 7, 2015, and obtained by Reuters.
Jan. 7, 8:30 a.m.
Charlie Hebdo tweets a cartoon of Islamic State chief Abu Bakr al-Baghdadi. The caption translates to: "Best wishes, by the way."

Jan. 7, 11:30 a.m., Paris:
Attack on Charlie Hebdo office leaves 12 dead. Attackers escape scene by car.
Police officers secure access to a residential building during investigations in the eastern French city of Reims January 8, 2015.
Jan. 7, Reims:
Dozens of police officers were dispatched to Reims, where one of the terror attack suspects reportedly lived. Police raid several homes and make arrests.
Police investigators search for evidence as an unidentified man is detained (L) during an operation in the eastern French city of Reims January 8, 2015.
Late in the day, Jan. 7, Charleville-Mézières:
Charlie Hebdo attack suspect Hamyd Mourad, 18, surrenders to police. Two other suspects, brothers Said Kouachi and Cherif Kouachi remained at large.
A Gendarmerie cordon is seen at a gas station in Villers-Cotterets, north-east of Paris, January 8, 2015, where armed suspects from the attack on French satirical weekly newspaper Charlie Hebdo were spotted in a car.
10:30 a.m. Jan. 8, Villers-Cotterets:
Police say suspects robbed a petrol station just north of Paris, fled into forest on foot.
French police assist a woman after a shooting in the street of Montrouge near Paris January 8, 2015. A policewoman (not in picture) was killed in the shootout in southern Paris on Thursday.
Jan. 8, Montrouge:
A female police officer was killed during a shootout with a gunman. Police sources wouldn't say if the shootout was linked to the Charlie Hebdo attack.
French special forces sharp shooters take position on a rooftop of the complex at the scene of a hostage taking at an industrial zone in Dammartin-en-Goele, northeast of Paris January 9, 2015.
Jan. 9, Dammartin-en-Goële:
Said and Chérif Kouachi exchange fire with police near Paris’s Charles de Gaulle airport, before taking a hostage in a print shop.
A member of the French police special forces takes position near the scene of a hostage taking at a kosher supermarket near the Porte de Vincennes in eastern Paris January 9, 2015.
Jan. 9, Porte de Vincennes:
Another gunman who police believe is linked to the Kouachi brothers and the shooting of the policewoman, takes hostages at a kosher grocery store.​
Smoke is seen at left as French police special forces launch their assault at a kosher supermarket (seen at rear) where several people were taken hostage near the Porte de Vincennes in eastern Paris January 9, 2015.
Jan. 9:
The two Kouachi brothers and the other gunman are killed when police co-ordinate attacks on the two buildings. The hostages are released. Hollande confirms four dead in kosher deli hostage-taking.​