New York ( CNN ) -- A Bosnian immigrant accused of plotting to bomb New York 's subway system as an `` al Qaeda terrorist '' has been found guilty on all counts , including conspiracy to use weapons of mass destruction , conspiracy to commit murder and supporting a foreign terrorist organization . Adis Medunjanin , wearing a black suit with a gray shirt and tie , gazed at family members as the verdict was read aloud in court Tuesday . His sentencing is scheduled for September 7 . `` I want to commend prosecutors for the conviction of Adis Medunjanin , '' Police Commissioner Ray Kelly said . `` His conviction stands as a stark reminder of terrorists ' desire long after 9/11 to return to the city to kill more New Yorkers . '' During the trial , prosecutors said Medunjanin traveled to Pakistan 's tribal region with two high school friends , Pakistani-born Najibullah Zazi and Zarein Ahmedzay , an immigrant from Afghanistan . His friends have pleaded guilty to planning the attack with Medunjanin , testified against him and are awaiting sentencing . Prosecutors said Medunjanin sought to join the Taliban , but ended up being recruited by al Qaeda to perform a suicide mission back in the United States . Upon their return , Medunjanin and his two friends hatched a plan to rig backpacks with explosives and blow them up , prosecutors said . `` As this case has proved , working against sophisticated terrorist organizations and against the clock , our law enforcement and intelligence agencies can detect , disrupt and destroy terrorist cells before they strike , saving countless innocent lives , '' U.S. Attorney Loretta Lynch said in a statement on the verdict . Robert Gottlieb , Medunjanin 's attorney , said his client `` was always realistic about the environment in which the case was tried , '' referring to U.S. court proceedings in a post-9/11 America . Gottlieb added that Medujanin told him , `` Tell my family to be strong . '' In closing arguments last week , Assistant U.S. Attorney Berit Berger said the defendant was willing `` to strap a suicide bomb to himself , walk into a New York City subway and blow it up . '' Berger told jurors that al Qaeda leaders assigned the mission to Medunjanin in 2008 , while he was in Pakistan 's tribal region with his friends . Gottlieb had denied that account , insisting that his client traveled there `` not to join al Qaeda but to join the Taliban in fighting foreign troops in Afghanistan . '' He said Medunjanin wanted to join the Taliban to stand up for Muslims and defend Islam , calling all three young men `` immature , naive and clueless '' when they set out . `` They wanted to fulfill some romantic version of jihad , '' Gottlieb said .
Sentencing for Adis Berit Berger is set for September 7 . Prosecutors said Medunjanin traveled to Pakistan 's tribal region with three friends . His attorney said his client went to Afghanistan `` not to join Taliban , but to join the al Qaeda ''