Yemen's Nobel Peace Prize winner has been denied entry to Egypt. <br /><br />Tawakkul Karman arrived in Cairo on Sunday morning, but was detained at the airport and prevented from travelling to Adaweya Square.<br /><br />Airport officials say she was blocked from entering for "security reasons."<br /><br />She is now returning to the Yemeni capital. <br /><br />She told Al Jazeera that authorities are concerned she will tell the truth about what's going on inside Egypt.
