Najibullah Zazi searched online for information on how to build a bomb and where to buy the parts .
Najibullah Zazi is an al - Qaeda member who pleaded guilty in February 2010 to a plot to bomb the New York City Subway system .
Najibullah Zazi , an al - Qaeda member who pleaded guilty in February 2010 to a plot to bomb the New York City Subway system , searched online for information on how to build a bomb and where to buy the parts .