Currently available approaches for the detection and remediation of explosives involve diagnostics,containment/disruption (including robotically retrieving and disarming devices), and simulation/training.
Explosive Detection and Remediation
United States Government Accountability Office. (2010). Technology assessment: Explosives detection technologies to protect passenger rail (Rep. No. GAO-10-898). Retrieved from http://www.gao.gov/assets/310/307828.pdf