Weeks of drama in Egypt reach a climax with the resignation of President Mubarak. Hugh Sykes tells of the joy in Cairo's Tahrir Square; Rupert Wingfield Hayes examines what will happen to the army of police, thugs and torturers who enforced Mubarak's police state; Jonathan Marcus explains how western diplomats were left floundering by this very Egyptian revolution; Sarah Monaghan's in Oman, a distant outpost of the Arab world waiting to see if the winds of change will blow through there as well and Justin Webb muses on the effect the changing shape of the Middle East might be having on American foreign policy.