Spring flowers blossom in Iran's Tehran People walk past flowers at a park in Tehran, Iran, on April 12, 2012. Spring flowers blossom ...

Spring flowers blossom in Iran's Tehran

People walk past flowers at a park in Tehran, Iran, on April 12, 2012. Spring flowers blossom here as the temperature keeps rising recently. (Xinhua/Ahmad Halabisaz)

Iranian children are seen near flowers at a park in Tehran, Iran, on April 12, 2012. Spring flowers blossom here as the temperature keeps rising recently. (Xinhua/Ahmad Halabisaz)

A woman takes photos of flowers at a park in Tehran, Iran, on April 12, 2012. Spring flowers blossom here as the temperature keeps rising recently. (Xinhua/Ahmad Halabisaz)

A man rests near flowers at a park in Tehran, Iran, on April 12, 2012. Spring flowers blossom here as the temperature keeps rising recently. (Xinhua/Ahmad Halabisaz)

Spring flowers blossom in Tehran as the temperature keeps rising recently.