A report in the daily Haaretz newspaper claimed that U.S. President-elect Barack Obama's administration will offer Israel a "nuclear umbrella" against the threat of a nuclear attack by Iran. Quoting  a well-placed American source  the report said the U.S. will declare that an attack on Israel by Tehran would result in a devastating U.S. nuclear response  against Iran.  The sources said the nuclear guarantee would be backed by a new and improved Israeli anti-ballistic missile system. 12/11/08