But when Zarein Ahmedzay and Najibullah Zazi arrived in Pakistan in the summer of 2008, two high-ranking al-Qaida operatives gave them another set of marching orders.
"They told us we would be more useful if we returned to New York City ... to conduct operations," Ahmedzay said Friday in a guilty plea that offered more chilling details of a foiled plot attack on the New York City subways last fall.
Asked by a judge in federal court in Brooklyn what kind of operations, he responded: "Suicide-bombing operations."
The attacks were to coincide with Ramadan and target landmarks, but the plan was scaled back because the conspirators didn't have enough homemade explosives.
The plea also marked the first time prosecutors named the al-Qaida operatives involved in the high-profile case.
Assistant U.S. Attorney Jeffrey Knox identified them as Saleh al-Somali and Rashid Rauf, who were both killed in Pakistan. The U.S. Justice Department on Friday described al-Somali as the head of international operations for al-Qaida.
Al-Somali was killed in a drone strike in December. Rauf, a British militant linked to a jetliner bomb plot, was also killed in a Predator strike in November 2008.
Knox said Ahmedzay met with a third senior al-Qaida operative in a training camp in northern Waziristan in Pakistan. He has not been identified.
Prosecutors say the 25-year-old Ahmedzay - who pleaded guilty to conspiracy to use weapons of mass destruction and other charges
- joined Zazi and Adis Medunjanin, another friend from their Queens high school, on the trip to Pakistan to seek terrorism training.
Zazi, a Colorado airport van driver, admitted this year that he tested bomb-making materials in a Denver suburb before traveling by car to New York with the intent of attacking the subway system to avenge U.S. military involvement in Afghanistan.
Ahmedzay, who had been licensed to drive a taxi in New York, said Friday that al-Qaida leadership encouraged the men to target "well-known structures" in New York to cause "maximum casualties." He said they also decided that the attack should occur during the Muslim holy month of Ramadan, between Aug. 22 to Sept. 20.
Ahmedzay quoted heavily from a jihad verse in the Quran and urged Americans to "stop supporting the war against Islam."
"I'm thankful for myself that I didn't harm anyone, but I feel someone else will do the same thing," he said.