Three Ukrainian naval ships attempted to force passage through the Kerch Strait in Crimea, between the Black Sea and the Sea of Azov, on Sunday, before they were intercepted and captured by the Russian coast guard.
Kiev is banking on its Western allies to provide military support to contain Russian Federation, which it says is preparing to invade its territory by land.
The United States and the European Union have imposed sanctions on Russia over its actions toward Ukraine since 2014, when Moscow annexed Crimea following the toppling of a pro-Russian leader in Kiev.
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However, in the event of special moments, the Rover system is provided with a reinforced drilling and splitting of samples. Since landing, it has taken two photos and sent them back as postcards to Earth, showing off its new home.
That session will lead into the large gathering of the G20, where Trump will find himself face-to-face with the collection of global leaders he has sometimes rebuffed.
She did not say why the meetings with Turkish President Recep Tayyip Erdogan and South Korean President Moon Jae-in had been downgraded.
Trump was supposed to sit later in the day with German Chancellor Angela Merkel, who hosted last year's G20 and has withstood sustained attacks by Trump over auto imports and trade.
Trump may also be vulnerable to charges that he lied to special counsel Robert Mueller, who is investigating the president's Russian Federation ties. She did not offer any explanation for those changes to the schedule.
Most of the more than 30 people charged by Mueller are Russians, but the investigator has also secured guilty pleas on various charges against former Trump aides.
Trump's tweet appeared shortly after he boarded Air Force One to depart for the summit.
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As of this weekend, about 5,000 migrants are in Tijuana waiting to enter the United States with majority planning to claim asylum. Customs and Border Protection agency said.
The president faced blowback after his one-on-one meeting with Putin in Helsinki this past summer, where he declined to forcefully confront the leader and even explained Putin's denial of hacking the US elections.
The president's stated reason for skipping a Putin meeting - the crisis in Ukraine - is a legitimate one.
While Trump's statement was strongly worded, he has made similarly dramatic moves before only to walk them back.
"First of all, questions related to bilateral relations, we need to think about how to start talking on matters of bilateral relations, on matters of strategic security and disarmament and on regional conflicts", he told journalists in a regular press briefing.
A court in Simferopol, in Crimea, will decide on a pretrial restriction for nine detained Ukrainian sailors, Crimea's Human Rights Commissioner Lyudmila Lubina said on Wednesday. "Great family. And you're doing a fantastic job, and I want to congratulate you", he added.
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China, meanwhile, wanted a reaffirmation of opposition to protectionism and unilateralism that it says the U.S.is engaging in. Pence also knocked China for loans to developing countries in the Pacific and beyond.