Capping a day of strident warnings by Israeli officials about the dangers posed by Iran, Defense Minister Ehud Barak said Thursday that the world is increasingly ready to consider a military strike against Iran if economic sanctions don’t halt Tehran’s suspect nuclear program.

Earlier in the day, officials gathered at a strategy conference in this posh seaside suburb asserted that Iran has already produced enough enriched uranium to eventually build four rudimentary nuclear bombs and — in what would be an explosive new twist — was even developing missiles capable of reaching the United States.