async.each and http get

I want to programmatically fetch meta tags from multiple urls and use for furthur processing. I'm using this below code snippet, this one always prints only the first urls meta tag and the async callbacks res is undefined. Am I missing anything here with async?

var http = require('http'),
    cheerio = require('cheerio'),
    async = require('async'),
    urls = [
        "http://theatlantic.com",
        "http://nytimes.com"
    ];

    function test() {
    var $, data = '';

    getMetaData = function(uri, callback) {
        http.get(uri, function(resp) {
            console.log('Fetching Url:' + uri);

            resp.on('data', function (chunk){
                data += chunk;
            });

            resp.on('end', function () {
                $ = cheerio.load(data);
                console.log('Meta Tag:' + $('meta[property="og:description"]').attr('content') + '\n'); //use for furthur processing
                callback(null, $('meta[name="description"]').attr('content'));
            });
        });
    }

    async.each(urls, getMetaData, function(err, res) {
       console.log(res);
    });
};

test();