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].

Seoul, South Korea (CNN) -- North Korea on Monday fired more projectiles into the sea off its east coast, South Korean officials said, urging Pyongyang to refrain from "tension-creating acts." But Pyongyang described the launches as a "regular military exercise." The South Korean Defense Ministry still needs to analyze exactly what the North has been firing for the past three days, said Choi Yong-su, an official in the ministry representative's office. They could be short-range missiles or a new kind of large-caliber artillery rocket, the ministry said. The North fired three projectiles into waters off its east coast Saturday and a fourth Sunday. It fired two more Monday, Choi said.North Korea says the launches are a "regular military exercise"North Korea has fired six projectiles into the sea over the past three days, Seoul saysThe South says they could be short-range missiles or large-scale artilleryThe North last week criticized the presence of a U.S. aircraft carrier in the region 
 Question:Before last week, tensions in the region had eased from a period in March and April that included near daily _ threats of war against South Korea and the United States.
North Korea

Washington (CNN) President Donald Trump proclaimed Thursday he was withdrawing the US from the Paris climate accord, a sweeping step that fulfills a campaign promise while acutely dampening global efforts to curb global warming. Speaking from the White House, Trump said he was open to renegotiating aspects of the agreement, which was inked under his predecessor and which all nations except two have signed onto. But he was withering in his criticism of the pact, which he cast as a humiliating defeat for American workers that unfairly advantaged foreign countries. "At what point does America get demeaned? At what point do they start laughing at us as a country?" Trump inquired during an afternoon event held in a sun-drenched Rose Garden.Trump made the announcement Thursday"We're getting out," he said"The Paris accord is very unfair at the highest level to the United States." 
 Question:Briefing reporters, White House officials would not specify what parameters would be acceptable to _ in a new accord.
Donald Trump

Calexico, California (CNN) For the first time on the border, drug traffickers allegedly bought U.S. property for the sole purpose of building a house to conceal the end of a 415-yard smuggling tunnel from Mexico, authorities said Wednesday. Inside the life of a drug-trafficking teen Four people were arrested this week in connection with a raid on the tunnel underneath a three-bedroom house in Calexico, California, that sits about 300 yards north of the international line, authorities said. The tunnel entrance was inside a restaurant in Mexicali, Mexico, according to U.S. Immigration and Customs Enforcement. Authorities confiscated 1,532 pounds of marijuana, with a street value of nearly $6 million.Smugglers allegedly bought U.S. property for the sole purpose of hiding a drug tunnel, feds saySmugglers allegedly built a house with a hole in living room that led to tunnelThe drug tunnel ran 415 yards between Calexico, California and a restaurant in Mexicali, Mexico 
 Question:Smugglers also used a second _ residence four miles from the tunnel exit to store the drugs and then they moved the narcotics to a Calexico warehouse, where transportation cells moved the drugs to the cities northward, authorities said.

Calexico