In his statement, Nafis included quotations from "our beloved Sheikh Osama bin Laden" to justify the killing of women and children that Nafis expected would result from the attack. "We will not stop until we attain victory or martyrdom," he said. Lynch said Nafis came to America "not to further his studies but to advance the goals of jihad. Once here, he devoted his energies to refining his plan to disrupt the US economy and kill Americans and attempting to recruit others to join him". "We will not wait for our enemies to attack us before using the tools at our disposal to discourage, disrupt, and, ultimately, detain them with lengthy terms of incarceration," Lynch said. Nafis purchased components for the bomb's detonator and conducted surveillance for his attack on multiple occasions in the city's financial district in lower Manhattan, the FBI statement said. New York Police Commissioner Raymond Kelly said Nafis is one of the several people charged in terrorist plots over the years against targets in New York city. "There have been 16 plots against the city that we know of since the World Trade Center Twin Towers were destroyed in 2001. Time and again, individuals intent on making a violent terrorist statement select New York City as their venue," he said.