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The 21cm line of neutral hydrogen provides unique access to the state of the intergalactic medium throughout our Cosmic Dawn, making it an essential tool for understanding the history of structure formation in our universe. Experiments are nearing a first detection of this cosmological signal and will begin characterizing its power spectrum. So far, the most progress has been made with dedicated experiments like PAPER, tailored to this single science application. The partially funded Hydrogen Epoch of Reionization Array (HERA) continues in this vein, competing scientifically with the Square Kilometre Array (SKA) for a small fraction of the cost. The logical next step beyond this involves directly imaging reionization, but unlike for power-spectral measurements, key challenges remain unsolved for building an imaging instrument. Given an uncertain path and timescale for solving these challenges, the US community is faced with a tough decision. Do we join with SKA-low --- a leveraged instrument being designed too soon, with many competing science applications --- or plan a separate, tailored effort once HERA has delivered more insight?
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