Several dozen demonstrators gathered in Pakistan's largest city, Karachi, on Tuesday, to protest against the killing of Al-Qaeda leader Osama bin Laden in a US special forces' mission a day earlier. Chanting "Obama! Solve your own problems" and "The friend of America is a traitor", members of Pasban (Pakistan Voice Against Injustice) youth organisation rallied against US troops crossing into Pakistan to raid bin Laden's compound in the town of Abbottabad.<br /><br />RT on Facebook: http://www.facebook.com/RTnews<br />RT on Twitter: http://twitter.com/RT_com