Politics

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FILE - This Sept. 17, 2013 file photo shows an armed officer who said he is with the Defense Department, standing near guard the gate at the Washington Navy Yard the day after a gunman launched an attack inside the Yard. An independent review triggered by the Washington Navy Yard killings last year says threats to Defense Department personnel and facilities increasingly are coming from within. It says the department must rethink its outdated security theory that suggests defending the perimeters can keep threats away. Instead, it says that terrorism, espionage and even physical threats are coming from trusted insiders. (AP Photo/Jacquelyn Martin, File)

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Russian President Vladimir Putin, right, Speaker of Crimean legislature Vladimir Konstantinov, center, and Crimean Premier Sergei Aksyonov stand after signing a treaty to incorporate Crimea into Russia in the Kremlin in Moscow, Tuesday, March 18, 2014. President Vladimir Putin on Tuesday signed a treaty to incorporate Crimea into Russia, describing the move as the restoration of historic injustice and a necessary response to what he called the Western encroachment on Russia’s vital interests. (AP Photo/Alexander Zemlianichenko)

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Russian President Vladimir Putin, second right, Speaker of Crimean parliament Vladimir Konstantinov, second left, Crimean Premier Sergei Aksyonov, left, and Sevastopol mayor Alexei Chalyi, right, sit during a signing ceremony for the treaty to join Crimea with Russia in the Kremlin, Moscow, Tuesday, March 18, 2014. President Vladimir Putin on Tuesday signed a treaty to incorporate Crimea into Russia, describing the move as the restoration of historic injustice and a necessary response to what he called the Western encroachment on Russia’s vital interests. (AP Photo/Alexander Zemlianichenko)

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Russian President Vladimir Putin gestures after signing a treaty to incorporate Crimea into Russia in the Kremlin in Moscow, Tuesday, March 18, 2014. President Vladimir Putin on Tuesday signed a treaty to incorporate Crimea into Russia, describing the move as the restoration of historic injustice and a necessary response to what he called the Western encroachment on Russia’s vital interests. At right is Sevastopol mayor Alexei Chalyi. (AP Photo/Alexander Zemlianichenko)

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Russian President Vladimir Putin enters the hall to address the Federal Assembly in the Kremlin in Moscow, Tuesday, March 18, 2014. President Vladimir Putin on Tuesday signed a treaty to incorporate Crimea into Russia, describing the move as the restoration of historic injustice and a necessary response to what he called the Western encroachment on Russia’s vital interests. (AP Photo/Sergei Ilnitsky, pool)

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Russian President Vladimir Putin addresses the Federal Assembly in the Kremlin in Moscow on March 18, 2014. Putin signed a treaty to incorporate Crimea into Russia, describing the move as the restoration of historic injustice and a necessary response to what he called the Western encroachment on Russia’s vital interests. (Associated Press)

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Russia's President Vladimir Putin addresses the Federation Council in Moscow's Kremlin on Tuesday, March 18, 2014. President Vladimir Putin defended Russia’s move to annex Crimea, saying that the rights of ethnic Russians have been abused by the Ukrainian government. He pointed at the example of Kosovo’s independence bid supported by the West, and said that Crimea’s secession from Ukraine repeated Ukraine’s own secession from the Soviet Union in 1991. (AP Photo/Sergei Ilnitsky, pool)

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Russia's President Vladimir Putin addresses the Federation Council in Moscow's Kremlin on Tuesday, March 18, 2014. President Vladimir Putin defended Russia’s move to annex Crimea, saying that the rights of ethnic Russians have been abused by the Ukrainian government. He pointed at the example of Kosovo’s independence bid supported by the West, and said that Crimea’s secession from Ukraine repeated Ukraine’s own secession from the Soviet Union in 1991. (AP Photo/Sergei Ilnitsky, pool)

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Russia's President Vladimir Putin addresses the Federation Council in Moscow's Kremlin on Tuesday, March 18, 2014. President Vladimir Putin defended Russia’s move to annex Crimea, saying that the rights of ethnic Russians have been abused by the Ukrainian government. He pointed at the example of Kosovo’s independence bid supported by the West, and said that Crimea’s secession from Ukraine repeated Ukraine’s own secession from the Soviet Union in 1991. (AP Photo/Alexander Zemlianichenko)

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Russia's President Vladimir Putin addresses the Federation Council in Moscow's Kremlin on Tuesday, March 18, 2014. President Vladimir Putin defended Russia’s move to annex Crimea, saying that the rights of ethnic Russians have been abused by the Ukrainian government. He pointed at the example of Kosovo’s independence bid supported by the West, and said that Crimea’s secession from Ukraine repeated Ukraine’s own secession from the Soviet Union in 1991. (AP Photo/Alexander Zemlianichenko)

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Russian President Vladimir Putin, second right, Speaker of Crimean legislature Vladimir Konstantinov, second left, Crimean Premier Sergei Aksyonov, left, and Sevastopol mayor Alexei Chalyi, right, shake hands after signing a treaty for Crimea to join Russia in the Kremlin in Moscow, Tuesday, March 18, 2014. President Vladimir Putin on Tuesday signed a treaty to incorporate Crimea into Russia, describing the move as the restoration of historic injustice and a necessary response to what he called the Western encroachment on Russia’s vital interests. (AP Photo/Sergei Ilnitsky, Pool)