These colonies have since relied on the services of a company known as Bridges, whose porters brave the BTs, bandits, and terrorists to deliver supplies to the cities. Bridges also performs various governmental functions on behalf of the UCA. If they achieve a mental connection to a "Bridge Baby" (a "BB")—a premature child reflecting a state between life and death—it is possible for a person to sense the presence of a BT. Porters carry a BB with them, which is stored in a pod simulating a mother's womb. A condition known as "DOOMS", depending on its severity, also allows a person to naturally sense, see, or even control a BT, as well as granting a variety of powers, such as teleportation or travel to other people's Beaches. There are also individuals known as "repatriates" who can travel back from "the Seam"—a place between the world of the living and the Beach—upon death. As such, these individuals can effectively return from death, though their deaths will still cause voidouts if killed during contact with a BT.