In 2004, QuIST-funded researchers demonstrated the DARPA Quantum Network, the first working quantum key distribution network. At its start, it employed coherent laser pulses over optical fiber media, sending unconditionally-secure messages between Harvard University, Boston University and BBN Technologies in Cambridge, Massachusetts. It later grew to a fully operational, 10 node network, conveying key material both through telecom fiber and the atmosphere. The work was given a DARPA award four years later.