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US will ‘do what is necessary’ on Iran, Obama says

JERUSALEM (AP) — Eager to reassure an anxious ally, President Barack Obama on Wednesday promised to work closely with Israel and do whatever is necessary to keep Iran from obtaining nuclear arms, ‘‘the world’s worst weapons.’’ He also pledged to investigate whether chemical weapons were used this week in neighboring Syria’s two-year-old civil war.

Obama, meeting with Israeli Prime Minister Benjamin Netanyahu on his first visit to the Jewish state as president, said of Iran’s nuclear ambitions: ‘‘We prefer to resolve this diplomatically and there is still time to do so.’’ But he added that ‘‘all options are on the table’’ if diplomacy falls short.

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