(Israel Antiquities Authority/YouTube) Israeli researchers made a rare find during a survey of a Dead Sea cave: Four perfectly preserved Roman swords thought to have been used in battle 1,900 years ago. The swords were likely "booty" hidden by rebels from an opposing faction, who would have been in danger if they were caught carrying the Roman weapons, Eitan Klein, one of the directors of the Judean Desert Survey Project who worked on the dig, said in a statement. Four Roman-era swords, their wooden and leather hilts and scabbards and steel blades exquisitely preserved after 1,900 years in a desert...