Cossack cadets toss their rifles as they practice for an upcoming performance to mark the130th anniversary of the founding of the Novocherkassk Cossack cadet corps, outside a cathedral in the southern Russian city of Novocherkassk. (Reuters)

A woman walks near a tram at the Alfama neighborhood in Lisbon, Portugal. (Reuters)

U.S. President Barack Obama and first lady Michelle Obama dance during the Commander-In-Chief Inaugural ball at the Washington Convention Center during the 57th Presidential Inauguration in Washington, D.C, January 21, 2013.

A woman climbs during the opening of a rope park at the Shimbulak Ski Resort in the Tien Shan mountains outside Almaty, Kazakhstan. The newly opened park is world’s highest rope park mounted on artificial supports, said its designers. (Reuters)

Musicians sit outside the National Congress before the state of the nation speech by Bolivia’s President Evo Morales in La Paz. (AP)

A Pakistan woman steps on recyclable plastic bags drying in the sun in Lahore. (AFP)

Fans watch the tennis action at Rod Laver Arena during the Australian Open tennis tournament in Melbourne. (Reuters)

Umbrellas are displayed in front of Seoul City Hall in Seoul, South Korea. (AP)

Neeta, 11, helps her father as she carries material to be used for burning fire in a kiln at a brickyard on the outskirts of Kota, in India’s desert state of Rajasthan. (Reuters)

A snowman sits on a bench on Hampstead Heath in London. (AP)