Why Is Putin Crying?

Yesterday all famous news portals were telling about how Vladimir Putin was crying, after being elected as the  President of Russian. In this video you can easily see the tears on Putin's eyes. The news portals are writing that the tears were, because he was very happy, some of them write that it was a strategy.
Though, the press secretary of Putin told that Putin wasn't crying, and the tears were because of the wind.
I will let everyone decide for himself the reason of Putin's tears. However, I congratulate him, and I think that comparing to the other candidates, he is the only one, who can  lead the biggest country in the world.