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A bird is perched on barbed wire that surrounds the Jilava prison near Bucharest

A bird is perched on barbed wire that surrounds the Jilava prison near Bucharest February 28, 2013. A visit to the prison, part of a conference on drug abuse in prisons and its relation to the rise of HIV-AIDS, was organized to meet inmates who are part of a project in which they receive therapeutic help to overcome their problems with narcotics. The conference is organized by the Council of Europe and Romania's National Anti-drug Agency. REUTERS/Bogdan Cristel (ROMANIA - Tags: TPX IMAGES OF THE DAY HEALTH DRUGS SOCIETY CRIME LAW) - RTR3EEJ7

Amazing sun halos captured around the world

A sun halo is an optical phenomenon

produced by ice crystals creating colored or white arcs and spots in

the sky. Many are near the sun or moon but others are elsewhere and even

in the opposite part of the sky. Commonly referred to as a 22-degree halo, it forms a ring exactly 22-degrees from the sun.