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) Last Friday, a million Russian schoolchildren watched a televised address from Russian President Vladimir Putin. "Artificial intelligence is the future, not only of Russia, but of all of mankind," Putin said. "Whoever becomes the leader in this sphere will become the ruler of the world." After seeing Putin's comments, SpaceX and Tesla CEO Elon Musk tweeted that "competition for AI superiority at national level (is the) most likely cause of WW3." Though never before stated so frankly by a head of state, Putin's views on AI are increasingly shared by national security leaders in the United States, China and around the world. As I wrote in a report published by the Harvard Belfer Center for Science and International Affairs, AI research is likely to deliver a revolution in military technology on par with the invention of aircraft and nuclear weapons. In other words, Musk is correct that each country is pursuing AI superiority and that this pursuit brings new risks.Gregory C. Allen: Though Russia may not lead in AI technology, it is at the forefront of weaponizing itAs an authoritarian leader of a nation with a declining economy, Putin has every reason to employ AI to maintain power, writes Allen 
 Question:Today, _'s military robots and drones are remotely operated, but in the future Russia plans to field "intelligent robotic complexes," meaning robotic military units powered by AI systems that can fight and kill without need for a human operator.
Russian

(CNN) -- For about 13 minutes, Team USA sat at the top of its World Cup soccer group, ahead of the mighty Germany and star-powered Portugal. Then Portugal struck back. With seconds left to play, Cristiano Ronaldo set up a header for his teammate Silvestre Varela, leaving the final score tied at 2-2. It was a harsh blow for the Americans, but it does not end their World Cup dreams -- it just makes them harder to achieve. With every team in Brazil now having played two matches, most groups now have clear winners and losers. But not Group G. In theory, any of the four teams in the group of Germany, the United States, Ghana and Portugal could still qualify for the knockout round.Sunday's tie with Portugal makes it more difficult for USA to achieve its World Cup dreamsThe Americans secure a place if they beat or draw with GermanyNetherlands tops Group B with victory over ChileNEW: Brazil, Mexico advance to the Round of 16 with convincing victories 
 Question:No matter who wins the Ghana-_ match, neither team can end up with more than four points.
Portugal

Washington (CNN) John Kelly was sworn in as President Donald Trump's new chief of staff Monday, tasked with bringing order to an often chaotic White House and jump-starting the President's stalled legislative agenda. "We look forward to, if it is possible, even a better job as chief of staff," Trump said of his former secretary of homeland security. Trump told reporters in the Oval Office that his administration has "done very well," noting the stock market, unemployment and business confidence. "We have a tremendous base, we have a tremendous group of support, the country is optimistic and I think the general will just add to it. The country is doing very well. Strongest stock market ever," Trump said.Kelly is a retired Marine Corps generalRepublicans on Capitol Hill hope Kelly will bring order to the White House 
 Question:And anybody who thinks they're going to change Donald Trump doesn't know _."

Donald Trump