in removable modular units. The stand-offs provide space for electrical connections, data management systems cabling for computers, air conditioning ducts, thermal control tubes and more, all of which support the space station's equipment racks. The racks interface to the piping and wiring in the standoff via outlets and ports located in the standoffs at the base end of each rack location. Jumpers in the vestibule, the area between Unity and Destiny, connect the piping and wiring between the two. Grounding straps between Unity and Destiny will be installed. One side of the grounding strap will be connected to the Active Common Berthing Mechanism (ACBM) on Unity, while the other end will be connected to the Passive Common Berthing Mechanism (PCBM) on Destiny. Some of the mechanisms on Destiny are the CBMs (passive and active), hatches, and the laboratory window shutter. The ACBM is in the forward port of the laboratory. It is attached to the Harmony node. The PCBM on Destiny is located in the laboratory's aft port. The ACBM in Unity's forward port is latched to the laboratory's PCBM to berth Destiny to Unity. Science equipment Destiny also contains the Minus Eighty Degree Laboratory Freezer for ISS (MELFI), transported to the Space Station on STS-121. The freezer is used both to store samples and reagents on the station, and to transport them to and from the space station in a temperature controlled environment. Currently installed at the main observation window of Destiny is the Agricultural Camera (AgCam). It is a multi-spectral imaging system built and primarily operated by students and faculty at the University of North Dakota. Its purpose is to take frequent images, in visible and infrared light, of vegetated areas on the Earth and promises to deliver a greater effectiveness for in-season agriculture applications research and operational decision support than current satellite systems such as Landsat. Veggie In 2016 the ISS crew operated Veg-03 experiment. In November they harvested a crop of edible romaine lettuce which contributed to the crew's meal. Also samples of cabbage are returned to Earth for testing as part of the experiment. This uses the Veggie experiment module in Destiny, which can provide light and nutrients for plant growth experiments. Destiny nadir window The nadir window is formally known as the U.S. Laboratory Science Window, has the "...highest quality optics ever flown on a human occupied spacecraft...", according to NASA, and can support