Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Tweet with a location 
  
 You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more ||||| TORONTO (AP) — It began with Canada tweeting some not-so-friendly travel tips for the Russian military: a map showing Russia and labeling Ukraine as "not Russia." 
  
 This combination image shows a map tweeted by the Canadian Joint Delegation to NATO on Wednesday, Aug. 27, 2014, top, and a map tweeted in response on Thursday by the Twitter Feed of the Permanent Mission... (Associated Press) 
  
 That opening shot was enough to launch a Twitter war of words — and maps. 
  
 Canada's NATO Twitter account posted the map Wednesday with the explanation: "Geography can be tough. Here's a guide for Russian soldiers who keep getting lost and 'accidentally' enter Ukraine." 
  
 The tweet went viral, being retweeted more than 25,000 times by late Thursday, including by U.S. U.N. Ambassador Samantha Power. 
  
 Russia struck back by tweeting its own map showing Crimea as part of its territory. Russia annexed Crimea from Ukraine in March. 
  
 Kiev accused Russia on Thursday of sending tanks, artillery and troops across Ukraine's border. 
  
 Russia says its only active duty soldiers in Ukraine were the 10 captured earlier this week, who Moscow insists had mistakenly wandered across the border. 
  
 NATO estimates that as many as 1,000 Russian troops are fighting inside Ukraine with an additional 20,000 soldiers massing on the border for support or possible reinforcements. 
  
 "It's important to look at this exchange through the current context," said Rick Roth, the top spokesman for Canadian Foreign Affairs Minister John Baird. "The original tweet was in the context of Russian military personnel being found in sovereign Ukrainian territory, claiming they were lost. Nobody believes that." 
  
 Dutch Brig.-Gen. Nico Tak said there has been a significant escalation in both the level and sophistication of Russia's military interference in Ukraine. 
  
 "We have also detected large quantities of advanced weapons, including air defense systems, artillery, tanks, and armored personnel carriers being transferred to separatist forces in eastern Ukraine," said Tak. 
  
 Baird called the recent events a "significant provocation" in advance of next week's NATO summit in Wales, where the alliance's leaders are expected to hold a special meeting with new Ukrainian President Petro Poroshenko. 
  
 Ukraine is not a member of NATO, so the alliance is not automatically obliged to come to its defense. 
  
 President Barack Obama ruled out the possibility that the U.S. will take military action over Ukraine and declined to characterize the assault as an invasion. ||||| Image copyright Getty Images Image caption Knowledge of geography is not an American strength 
  
 A review of the best commentary on and around the world... 
  
 Today's must-read 
  
 A recent survey conducted by three US college professors found that only one in six Americans could find Ukraine on a map of the world. The results are plotted in one shame-inducing graphic. 
  
 What's more disturbing is that the farther away from the actual location of Ukraine the survey participants guessed, the more likely they were to support US military intervention. 
  
 A few of the 2,066 respondents seem to think Ukraine is somewhere in the central US, which certainly would make an armed response easier. Alaska - Alaska! - is the target of nearly a dozen guesses. 
  
 Greenland and northern Canada are peppered with dots. Brazil. South Africa. A spot in the ocean south of New Zealand. 
  
 Is it too much to hope that some of the people surveyed were just messing with the pollsters? 
  
 Political independents performed best, with 29% picking correctly. Republicans (15%) and Democrats (14%) were equally dismal. At least there's hope for the future. Twenty-seven per cent of Americans between 18 and 24 correctly located Ukraine. 
  
 Dartmouth Prof Kyle Dropp, Harvard Prof Joshua D Kertzer and Princeton Prof Thomas Zeitzoff write in the Washington Post that their survey reveals a disturbing truth: 
  
 Even controlling for a series of demographic characteristics and participants' general foreign policy attitudes, we found that the less accurate our participants were, the more they wanted the US to use force, the greater the threat they saw Russia as posing to US interests, and the more they thought that using force would advance US national security interests; all of these effects are statistically significant at a 95% confidence level. 
  
 It's worth noting, however, that no matter how woefully misinformed Americans are about Ukraine's actual location, only 13% of the total survey wanted to intervene militarily. 
  
 Canada 
  
 Time for a US-Canadian merger - Russia and China have their sights set on Canada's "rich and poorly defended open spaces", writes syndicated columnist Froma Harrop. If the US wants to protect its northern neighbour, she says, there's an obvious solution: a merger. 
  
 Harrop talks with the National Post's Diane Francis, who calls for a US-Canadian union in her new book, Merger of the Century. 
  
 "A merged Canada and US would occupy more land than Russia or all of South America," Harrop writes. "It would become an energy and economic powerhouse less subject to foreign intrigue. And few countries would mess with either of us." 
  
 Kenya 
  
 Terrorism and human rights - Kenya needs to have a "serious debate" about how to respond to the violence that has plagued the nation for three decades, writes Ken Nyaundi in the Standard. 
  
 While steps need to be taken to maintain security, he says, there is a price to be paid in liberty and the possibility that some steps taken could be counterproductive: "When we descend into a frenzied over-reaction, we drive terrorists further underground, generate sympathy for them and make them heroes". 
  
 Russia 
  
 Is a Ukraine invasion coming? - BBC's Jonathan Marcus analyses the latest information on Russian troop movements along the Ukrainian border and comes to the conclusion that the Russian military has learned from mistakes made in the 2008 invasion of Georgia. 
  
 Marcus talks with several experts who predict that Russia is capable of extended combat operations in Ukraine if it chooses to undertake them. 
  
 Ireland 
  
 British reconciliation - As Irish President Michael D Higgins makes the first-ever state visit to the UK on Tuesday, former President Mary Robinson remembers how differently she was treated on a non-official visit during her term in 1991. 
  
 "Because of Northern Ireland, the British would not agree to call me 'president of Ireland'!" she writes. 
  
 Her trip, she says, was a "carefully orchestrated meeting at head-of-state level between two countries with a troubled past seeking, in a symbolic way, to begin reconciling". 
  
 BBC Monitoring quote of the day 
  
 Iran and the powers have started the third round of nuclear talks. Representatives from Russia, the US, Britain, France, China and Germany - headed by EU foreign policy chief Catherine Ashton - are meeting Iranian Foreign Minister Mohammad Javad Zarif in Vienna. 
  
 One Iranian daily feels Tehran deserves praise for initiating the new rounds of talks: 
  
 "It seems that despite problems and suspicions created by domestic and American hard-liners, Iran's initiative to resume diplomatic negotiations was not considered as a sign of defeat and surrender, and Iran put an end to the propaganda created by Israel and some regional countries and secured its peaceful rights in the best way possible. As a result, Iran's nuclear industry remained intact and the country can perform its regional and international role with full respect." - Seyyed Ali Khorram in Iran's E'temad. 
  
 Have you found an interesting opinion piece about global issues that we missed? Share it with us via email at echochambers (at) bbc.co.uk. ||||| Add a location to your Tweets 
  
 When you tweet with a location, Twitter stores that location. You can switch location on/off before each Tweet and always have the option to delete your location history. Learn more ||||| Image copyright Russian Nato Mission Image caption Russia posted this map in response to Canada's Twitter jab 
  
 This is Russia. This is "not Russia". 
  
 That's the message the Canadian Nato delegation tweeted, in map form, to Russian soldiers "who keep getting lost and 'accidentally' entering Ukraine". 
  
 "Geography can be tough," it notes snarkily. 
  
 On Tuesday Ukraine released video of Russian paratroopers it says it captured within its eastern border. In response, Russian military sources said the men had crossed an unmarked portion of the border "by accident". 
  
 Canadian officials, it seems, aren't buying the story. Since the tweet went live, Ukrainian President Petro Poroshenko has alleged that Russian troops have been "deployed" in eastern Ukraine 
  
 The map, which was sent out on Wednesday morning, has been retweeted more than 16,000 times. Users took to social media to offer their own commentary on geographically misguided Russians and Canadian "cheekiness". 
  
 Image copyright @ReeceEmmitt 
  
 "This is probably the most aggressive Canadian act since like 1812," tweets Kelsey D Atherton. 
  
 Of course, Americans could also probably use a little remedial geography instruction, if a poll conducted by the Washington Post in April is any indication. 
  
 Image copyright Stephen Saideman 
  
 Only 16% of respondents correctly located Ukraine on a map, and more than a hundred of the 2,066 participants seemed to think the Eastern European country was somewhere near Greenland or, ironically enough, Canada. 
  
 As the Toronto Globe and Mail reports, the tweet - which notably includes the contested Crimean region as part of "not Russia" - isn't an isolated instance of Canadian criticism of alleged Russian incursions into Ukraine. 
  
 Image copyright @CanadaNATO 
  
 "Russia's acts of aggression and intimidation toward Ukraine call for collective action," said Canadian Foreign Minister John Baird on Tuesday. "Canada, together with its like-minded allies, must clearly speak out." 
  
 An illustration did not accompany that statement. 
  
 UPDATE: A little more than 24 hours after the Canadian Nato delegation sent out its now-viral map, the Russian Nato delegation returned fire with a tweet from its official account. 
  
 "Helping our Canadian colleagues to catch up with contemporary geography of #Europe," was the message attached to a map of the area around the Black Sea. 
  
 Most notably, the Crimean Peninsula is labelled "Russia" and Abkhazia and South Ossetia - which have declared their independence from Georgia but have not been internationally recognised - are shaded. 
  
 Russia and Georgia fought a battle in 2008 over the territories, which still contain Russian forces. 
  
 Conveniently left unillustrated is the portion of Eastern Ukraine that is currently home to most of the fighting between Ukrainian forces and separatist rebels, where Ukraine says the Russian paratroopers were captured. 
  
 We anxiously await a Russian-produced map of Canada that shows an independent Quebec. It seems to be the way diplomacy is being conducted these days. 
  
 Reporting by Anthony Zurcher 
  
 You can follow BBC Trending on Twitter @BBCtrending 
  
 All our stories are at bbc.com/trending |||||
Output:
Canadian officials had a message for Vladimir Putin this week: Here's where Russia isn't. NATO delegates from Canada tweeted a simplified map Wednesday that delineates Russia's borders, calling Russia "Russia" and Ukraine (including the Crimean region) "not Russia," the AP reports. "Geography can be tough," reads the message, which has been retweeted more than 36,000 times as of this writing. "Here's a guide for Russian soldiers who keep getting lost and 'accidentally' enter Ukraine." Russia still insists it isn't invading Ukraine, and says the only Russian soldiers to cross over were 10 guys who did so by mistake earlier this week. In fact, Russia's NATO delegation tweeted its own map showing the Crimean peninsula as belonging to Russia: "Helping our Canadian colleagues to catch up with contemporary geography of #Europe," it reads. Yet Russia's map "conveniently left unillustrated" the part of eastern Ukraine where the 10 Russian soldiers were said to be captured, the BBC notes. So, all of this was sparked by friendly old Canada? "This is probably the most aggressive Canadian act since like 1812," cracked one tweeter. But some Americans need help even finding Ukraine, according to one study: Only 16% could spot it on a map, and over 100 of the 2,066 participants figured it was near Greenland—or, appropriately, Canada, the BBC reports. (A Bulgarian artist created maps that depict typical American stereotypes of countries across the pond.)