Twitter, a micro-blogging service, is one of the most famous online services used by bloggers and journalists. Many people think its a useless service but it has turned out to be very useful in some critical situations.

At first glance, it seems to be that why would someone be interested in what other people are doing?. Anyone who is good in MySQL and PHP can design this site very easily. Not everyone has time to tell people that he or she is having lunch or coffee. And not everyone is interested to know who is sleeping or just had breakfast. But is the one of the life saver sites of the world wide web that is performing its role effectively for the awareness in the emergency or uncovered situations. Like on April 10 2008, James Buck, a graduate journalism student at UC Berkeley, and his translator, Mohammed Maree, were arrested in Egypt for photographing an anti-government protest. On his way to the police station, Buck used his mobile phone to send the message “Arrested” to his 48 "followers" on Twitter. Those contacted UC Berkeley, the US Embassy in Cairo and a number of press organizations on his behalf…(Read full story at Wikipedia)

On 27th November 2008, in Karachi, riots and deadly fights between two political groups were going on across the city. Being biased and restricted, media didn’t covered the real situation. At that day, twitter was there to keep us well informed. Many Tweeters living in Karachi were twitting about what is going on in their area. Many journalist and curious people from other countries also joined the tweeting…asking about the updates and situation.

Twitter is one of the services in today's world that challenges Governments, Agencies and Media to hide the actual facts.