I usually do races in DC. They typically always start in front of the Washington Monument, though I haven't done this particular race. It looks like it starts near the Tidal Basin.
Tips:
-Make sure to always check the race website first.
https://www.runpacers.com/race/veterans-day-10k/course/
-Show up to the race site at least 30-40 mins early to ensure you are able to find the starting line. Metro should be fine, but it may be a few blocks away from the nearest station.
-Make sure to follow the packet pick-up instructions. They are usually the day before the race or directly before the race start.
-Make sure to bring fluids in case there are no water stations