Watch "The Big Story" weekdays at 5 p.m. ET

U.S. police and authorities face the complicated task of trying to pick out terrorists among millions of people everyday. So how do they distinguish between terrorists and civilians? And are there rules of engagement they should operate under? We'll get insight from Skip Brandon, former deputy assistant director of counterintelligence and counterterrorism for the FBI.

Homemade explosives apparently have a short shelf life — only a few days. Did Thursday's bomb makers use the same batch from the 7/7 (search) attacks? Or did they just get the mixture wrong? We'll ask Gregory Baur, former director of the International Association of Bomb Technicians and Investigators.

Then, Pakistan (search) is often praised as one of our allies in the War on Terror. So why do they continue to be a main recruiting center for attacks around the world? Bob Baer, former CIA case officer and author of "Sleeping With the Devil," weighs in.

And, the failed terror attacks on London's transit system remind the Brits that terrorists still exist in England and threaten to strike at any moment. How are Londoners responding to living under this threat? We'll ask public relations consultant Max Clifford.

Plus, what can American investigators learn from how their British colleagues are handling the recent bombings in London? Former CIA officer Michael Swetnam, chairman and CEO of the Potomac Institute for Policy Studies, weighs in.

Real journalism: fair and balanced. That's why we're No. 1 — FOX News Channel.

About the Show

Veteran newscaster John Gibson gets to the core of the most salient issues facing America today as host of FNC's hard-hitting primetime show "The Big Story with John Gibson."

Airing Monday through Friday at 5 p.m. ET, "The Big Story" gives you expert legal analysis from Judge Andrew Napolitano.

"The Big Story with John Gibson" is one of the reasons that FOX News Channel is the most watched news network in daytime.

Note: All guests and topics subject to change