Explain the concept of 'dual-use technology' and its relevance to homeland security.

Dual-use technology refers to technology that can be used for both legitimate civilian purposes and for military or terrorist purposes. Its relevance to homeland security stems from the fact that items intended for peaceful uses can be diverted or adapted for malicious purposes. This poses a challenge for export controls and security measures, as it's difficult to prevent these technologies from falling into the wrong hands. Examples include certain chemicals that can be used to manufacture explosives, advanced computer software that can be used for cyberattacks, and unmanned aerial vehicles (drones) that can be used for surveillance or weapon delivery. Homeland security efforts must focus on monitoring and controlling the flow of dual-use technologies to prevent their misuse by terrorists or other adversaries.