text: // Coordinates for the 5 most populated U.S. cities
  var cities = [
      {
          location: [40.7128, -74.0059],
          city: "New York City",
          state: "NY",
          population: 8398748
      },
      {
          location: [41.8781, -87.6298],
          city: "Chicago",
          state: "IL",
          population: 2705994
      },
      {
          location: [29.7604, -95.3698],
          city: "Houston",
          state: "TX",
          population: 2325502
      },
      {
          location: [34.0522, -118.2437],
          city: "Los Angeles",
          state: "CA",
          population: 3990456
      },
      {
          location: [33.4484, -112.0740],
          city: "Phoenix",
          state: "AZ",
          population: 1660272
      }
  ];