How do you make a preview of your photo appear on Twitter Newsfeed?

[Alex]

Hi everyone,

When I look at my twitter feed I see previews of their photos show up. I know that this is a recent change that Twitter made, but I want to learn how to do it on my end as well. I've tried posting many photos, but they all are hidden and can only be seen if you click "view photo." I've searched online and the only thing I found from a twitter developer was "try posting it from a mobile phone," something that I find inconvenient. I'm also pretty sure all these people I'm following aren't posting from mobile phones. Please help, and thanks in advance!!

[Tudor]

<blockquote class="twitter-tweet" lang="ro"><p><a href="http://t.co/lkzoNTMxmI">pic.twitter.com/lkzoNTMxmI</a></p>— tudor ionescu (@itudor58) <a href="https://twitter.com/itudor58/statuses/431492935209582592">February 6, 2014</a></blockquote>
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