Aug. 28, 2008
Najibullah Zazi travels to Peshawar, Pakistan from Newark NJ, via Geneva, Switzerland and Dohha, Qatar.

Dec. 2, 2008
An e-mail account, which the FBI believes was controlled by Najibullah Zazi, receives an e-mail attachment with a nine-page handwritten jpeg containing bomb-making instructions.

Dec. 3, 2008
Another e-mail account, which the FBI also believes was controlled by Najibullah Zazi, receives the same e-mail attachment with a nine-page handwritten jpeg containing bomb-making instructions.

Jan. 25, 2009
Najibullah Zazi travels from Peshawar to JFK International Airport.

Summer 2009
Zazi conducts internet searches for hydrochloric acid and "bookmarked" a site called "Lab Safety for Hydrochloric Acid". FBI also found searches for beauty salongs for hydrocide and peroxide.

July 2009
Mohammed Zazi moves from New York City to Aurora and moves in with his son, Najibullah.

July/Aug./Sept. 2009
Zazi and others associated with him purchase unusually large quantities of hydrogen peroxide and acetone products from beauty supply stores in the Denver metropolitan area.

July 25, 2009
Zazi puchases six bottles "Liquid Developer Clairoxide" from a beauty supply store in Aurora.

Aug. 28, 2009
Zazi checks into a hotel suite in Aurora. The suite included a stove.

Sept. 6, 2:32 p.m.
Zazi checks into the same Aurora hotel suite. BFI testing for explosives and chemical reside in the suite revealed the presence of acetone residue in the vent above the stove. Zazi remained checked into the hotel through Sept. 7.

Sept. 8, 2009
Zazi searched the internet for locations of home improvement stores within the 11354 zip code, the Flushing neighborhood of Queens, New York.

Sept. 9, 2009
Najibullah Zazi leaves home in Aurora, Colo., in a rental car.

Sept. 10, 2009
Najibullah Zazi arrives in New York City. Zazi spends the night at a residence in Flushing, Queens.

Sept. 11, 2009
FBI searches Najibullah Zazi's rental car near the Queens residence. FBI finds a laptop computer containing the jpeg image of the pages of handwritten notes on how to make explosives. Rental car paperwork in car said Zazi was supposed to return rental car on Sept. 14, 2009 in New York. Also found in the residence was an electronic weight scale in the closet along with batteries. Both items contained Zazi's fingerprints.

Sept 12, 2009
Najibullah Zazi returns to Denver on a plane from La Guardia Airport.

Sept. 14, 2009
FBI Agents execute a search warrant on a residence in Queens. FBI seizes a black scale containing several double-A batteries. Zazi's fingerprints are found on both the scale and the batteries.

Sept. 15, 2009
9NEWS confirms an Aurora man is involved in the terror plot that led to the Queens, N.Y., searches. More...

At 3:30 p.m., 9Wants to Know investigator Jace Larson is the first reporter to interview Najibullah Zazi. He tells 9Wants to Know, "I am not a terrorist" and "I have no ties to terrorism." More...

Sept. 16, 2009 
Najibullah Zazi volunteers to be interviewed by the FBI and members of the Joint Terrorism Task Force at the FBI headquarters in Denver, CO. Zazi tells the FBI he had never seen the handwritten notes that were found on his computer, traced back to the December 2008 e-mails, and did not write the notes. Zazi also agrees to submit handwriting, DNA and fingerprint samples.  More...

Zazi's submitted handwriting samples show commonalities between handwriting on the documents found in his computer, but a final conclusion was not yet reached, pending expert analysis, according to a federal arrest affidavit.

9Wants to Know investigator Deborah Sherman breaks a story about the FBI going to Home Depot stores asking about purchases of certain chemicals like muriatic acid. More...

Sept. 17, 2009
Najibullah Zazi returns to FBI headquarters for a second day of interviews.

At the same time, FBI agents raid the apartment of Zazi and his parents in unincorporated Arapahoe County. Agents also raided a relative's home in Aurora. The raids continue late into the night, as do the interviews at FBI headquarters. More...

Sept. 18, 2009
Both Mohammed and Najibullah Zazi submit to questioning by the FBI. More...

Authorities in New York interview a suspect related to the case.

Sept. 19, 2009
Najibullah Zazi refuses to attend a prearranged meeting with the FBI calling off all talks.

At 7:30 p.m., NBC News reports of three impending arrests.

At 9:30 p.m., the FBI arrived at Zazi's apartment and emerged with first Mohammed and then Najibullah in handcuffs. Both were booked into the Denver City Jail and held over the weekend. More...

FBI in New York arrest Ahmad Wais Afzali, a third man accused of lying to federal prosecutors.

Sept. 20, 2009
Arrest affidavits are released, providing the public information on the government's arguments as to why Najibullah Zazi, Mohammed Zazi and Ahmad Wais Afzali were arrested.
Najibullah Zazi arrest affidavit
Mohammed Zazi arrest affidavit
Ahmad Afzali arrest affidavit

Sept. 21, 2009
Najibullah and Mohammed Zazi both appear in federal court at 1:30 p.m. Judge advised pair of the charges against them; Judge Craig Shaffer said: "The government alleges each of you made a false statement in matter involving domestic or international terrorism." More...

Sept. 23, 2009
9Wants to Know finds a notice posted on the apartment door of Najibullah Zazi saying he and his family need to move out by Oct. 3. The notice says that the apartment lease is expiring. More...

Also on Sept. 23, a grand jury in New York indicts Najibullah Zazi with conspiracy to use weapons of mass destruction.

Sept. 24, 2009
Najibullah Zazi appears in court. His detention hearing is continued to Sept. 25 to give both sides time to adjust to new charge against him. More...

Mohammed Zazi appears in court for a detention hearing. He is released on the condition he be monitored electronically. More...

Sept. 25, 2009
Najibullah Zazi appears in court in Denver where the charge of lying to a federal investigator is dropped clearing the way for him to be taken to New York City. He is taken to Centennial Airport and flown to Teterboro Airport in New Jersey. Once there, he is taken to Brooklyn via helicopter. He was drive to the Metropolitan Detention Center. More...