US Secretary of State Colin Powell called both Yasser Arafat and Prime Minister Sharon last night, demanding that they resume security talks immediately. Mr. Sharon told Powell that in the preceding 48 hours there had been 31 terror attacks, resulting in the wounding of four Israeli civilians; one of the wounded is in critical condition, and another is a 3-yeard-old boy. \"Arafat continues to give the green light to terrorism, is not arresting terrorists and has taken no preventative actions to foil terrorist attacks,\" Sharon told Powell.