[Agile aerial] robots like this have many applications. You can send them inside buildings as first responders to look for intruders, maybe look for biochemical leaks … [or they] can be used for transporting cargo.

Kumar is pointing to a central rationale for developing highly maneuverable flying robots: their ability to operate where humans or ground robots are slow, unsafe, or physically unable to go. The examples—entering buildings as a “first responder,” searching for intruders, detecting biochemical leaks—frame aerial robots as tools for rapid situational awareness and hazard assessment in constrained, GPS-denied, indoor environments. The final application, cargo transport, broadens the claim from emergency/security use to logistics, implying that advances in agility, autonomy, and reliability can translate into economically valuable tasks. Overall, the quote argues that technical progress in aerial robotics is justified by a wide spectrum of real-world, high-impact deployments.