Twitter jokes ruin U.S. vacation for two British tourists

Post-9/11 USA is highly cautious of any perceived threat

Watch what you tweet.

That's the message tourists are getting from a British travel association, after the news that a 26-year-old bar manager and his travel companion were detained and deported from Los Angeles International Airport last week after tweeting about coming to the U.S. to "destroy America" and "diggin' Marilyn Monroe up."

UK-based Abta told the BBC that "posting statements in a public forum which could be construed as threatening - in this case saying they are going to 'destroy' somewhere - will not be viewed sympathetically by U.S. authorities. In the past we have seen holidaymakers stopped at airport security for 'joking' that they have a bomb in their bag, thoroughly questioned and ending up missing their flights, demonstrating that airport security staff do not have a sense of humour when it comes to potential risk."

Facebook and Twitter get new look

The battle to be the king of the networking sites is about to step up a notch – with reigning champ Facebook and young contender Twitter launching re-designs.

As well as keeping ahead of each other, they know they must stay ahead of the chasing pack. The new-look Facebook will launch within two weeks but The Sun has had a sneak preview.

Meanwhile, the new version of Twitter went live yesterday. Here we profile the history of the rival sites and look at how they are evolving.