Those interested in this topic should check out the following essay by Robert Bunker – Projected Al Qaeda Use of Body Cavity Suicide Bombs Against High Value Targets.
“The Department of Homeland Security has warned airlines that terrorists may be considering surgically implanting explosives or explosive components in humans as a way to carry out attacks, FOX News Channel reported Wednesday, citing a US security official.”
Source: US government warns airlines of terrorists using surgically implanted bombs