In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

(CNN) -- Without firing a shot, Israeli Prime Minister Benjamin Netanyahu has achieved remarkable results in his efforts to counter Iran's nuclear program. In little more than a year, the prime minister has managed to move the Iran nuclear issue to the top of the international agenda, to toughen sanctions, and in an extraordinary move, to push U.S. President Barack Obama to strengthen American policy so that preventing Iran from acquiring nuclear weapons became the focus, rather than just containing Iran and its nuclear program. Indeed, if you throw in Republican challenger Mitt Romney's unwillingness to accept Iran even having the capacity to produce a nuke, Netanyahu's record is even better.Aaron Miller: Israeli PM Netanyahu has scored some victories on Iran nuclear programBut he says Netanyahu's new emphasis on drawing a red line is counterproductiveIsraeli politicians are crying wolf, threatening an attack that isn't happening, Miller saysMiller: Injecting the issue into U.S. election campaign further alienates President Obama 
 Question:This might actually create a greater sense of confidence that Netanyahu was giving the Americans the benefit of the doubt and build up some currency in the bank which Israel will need if in fact it does decide it must go it alone against _ in the spring.
Iran

Nicolas Hamilton, the younger brother of Formula One world champion Lewis Hamilton, is to compete in this season’s British Touring Car Championship. Hamilton, who has cerebral palsy, will make his debut in June and becomes the first disabled driver to compete in the series. The 22-year-old will take part in five of the 10 rounds at Croft, Snetterton, Rockingham, Silverstone and the final meeting of the championship at Brands Hatch. Scroll down for video... Nicolas Hamilton posed a picture with his British Touring Car. The Briton said 'it's been a tough few months' Nicolas Hamilton, pictured with his older brother Lewis at the Indian Grand Prix in 2013Nicolas Hamilton will take part in five of the 10 championship roundsThe 22-year-old lives with the neurological condition cerebral palsyHe competed in the Renault Clio Cup in 2011 and 2012Nicolas is the younger brother of F1 world champion Lewis Hamilton 
 Question:Nicolas' brother Lewis Hamilton is bidding to become the first _ to successfully defend his Formula One title.
Briton

The widow of a cardiac surgeon shot dead at a Boston hospital by his patient's son has given birth to their fourth child, a baby girl, less than three months after the doctor's slaying. Brigham and Women's Hospital announced Monday that Mikaela Jane Davidson was born April 4. Mikaela's father, Dr. Michael Davidson, was killed at the hospital January 20, leaving behind his wife, Dr. Terri Halperin, daughters Kate, 10, Live, 8, and their 2-year-old son, Graham. Scroll down for video New life: Mikaela Jane Davidson was welcomed into the world April 4, less than three months after her father, Boston heart surgeon Dr Michael Davidson, was shot dead by a deceased patient's sonDr. Michael Davidson was shot dead by Stephen Pasceri at Brigham and Women's Hospital in Boston in JanuaryPasceri's sister said he blamed the doctor for his mother's recent deathMarried Pasceri took his own life after shooting Davidson at heart centerDavidson's wife, plastic surgeon Dr Terri Halperin, was seven months pregnant at the time with their fourth childHalperin delivered daughter Mikaela Jane Davidson April 4, less than three months after husband's slaying 
 Question:Pasceri's relatives suggested that he was angry over the death of his mother, whom Dr _ had treated.

Michael Davidson

