Yusuf Islam, the British singer formerly known as Cat Stevens is taking legal action after he was refused entry into the United States. Mr. Islam said the decision to deny him entry on grounds of national security was 'wholly unfounded' and he wants an explanation.''We have now initiated a legal process to try and find out exactly what is going on, and to take all necessary steps to undo the injustice that I have suffered.' 'I am a man of peace and denounce all forms of terrorism and injustice.'Action was taken against the musician, who converted to Islam and changed...