The nation is on high alert today and throughout the coming two-day holiday for possible terrorist attacks. Police, military and other forces are deployed around the country, and an armed guard will be present in many synagogues. Prime Minister Sharon said that the four-hour IDF operation late Sunday into Ramallah had been successful in preventing a holiday attack. The forces arrested four Palestinian brothers and their father in connection with planned attacks in Jerusalem over the next few days. \"In my view,\" said Sharon, \"this was one of the most successful acts that have been carried out. These people were simply plucked out from their houses within the city of Ramallah.\" The high alert continues.