How do I embed Tweets?

[Phills14]

I used to be able to do it but now it doesn't work.

<blockquote class="twitter-tweet"><p>Interest From Heat, Cavaliers Causes Structural Damage To Greg Oden's Knees | More NBA News: <a href="http://t.co/aD5reJQt" title="http://onion.com/14wk2Vc">onion.com/14wk2Vc</a></p>&mdash; Onion Sports Network (@OnionSports) <a href="https://twitter.com/OnionSports/status/296714604401262592">January 30, 2013</a></blockquote>

What am I doing wrong?

 

[JMcCurry08]

<blockquote class="twitter-tweet"><p>I really hate traffic with a passion!</p>&mdash; LeBron James (@KingJames) <a href="https://twitter.com/KingJames/status/298417527170678785">February 4, 2013</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

Hmm I dont know, it worked yesterday

 

[TheAdmin]

It's on twitters end, not ours.