[
  {
    "key": "h1",
    "name": "Hughes H-1",
    "lat": 38.8879,
    "lng": -77.02085,
    "level": "1"
  },
  {
    "key": "voyager",
    "name": "Rutan Voyager",
    "lat": 38.8880,
    "lng": -77.0199,
    "level": "1"
  },
  {
    "key": "spitfire",
    "name": "Supermarine Spitfire",
    "lat": 38.8879,
    "lng": -77.0208,
    "level": "2"
  },
  {
    "key": "x29",
    "name": "Grumman X-29",
    "lat": 38.88845,
    "lng": -77.01875,
    "level": "2"
  }
]