Binary

Binary (Hard Case Crime MC8)
by John Lange, Michael Crichton
Political radical John Wright is plotting an act of mass destruction – and federal agent John Graves has him under surveillance, trying to figure out what the plot is.
When a government computer is hacked and a high-security shipment of nerve gas gets hijacked, Graves puts the pieces together – but can he stop Wright from unleashing his weapon before it kills a million people ... including the President of the United States?