I am not sure where the bad characters are!
./mongoimport -d examples -c mycities2 --file example_city.json --jsonArray
Sat Mar 22 17:30:29.849 exception:BSON representation of supplied JSON array is too large: code FailedToParse: FailedToParse: Bad characters in value: offset:115
Sat Mar 22 17:30:29.849 {'areaCode': ['916'],
'areaLand': 109271000.0,
'country': 'United States',
'elevation': 13.716,
'foundingDate': datetime.datetime(2000, 7, 1, 0, 0),
'governmentType': ['Council\u2013manager government'],
'homepage': ['
http://elkgrovecity.org/'],
'isPartOf': ['California', u'Sacramento County California'],
'lat': 38.4383,
'leaderTitle': 'Chief Of Police',
'lon': -121.382,
'motto': 'Proud Heritage Bright Future',
'name': 'City of Elk Grove',
'population': 155937,
'postalCode': '95624 95757 95758 95759',
'timeZone': ['Pacific Time Zone'],
'utcOffset': ['-7', '-8']}
Sat Mar 22 17:30:29.849 check 0 0
Sat Mar 22 17:30:29.849 imported 0 objects
Sat Mar 22 17:30:29.849 ERROR: encountered 1 error(s)