Chernobyl anniversary puts spotlight on nuclear safety

On Tuesday, Ukraine marked the anniversary of the world's worst nuclear disaster. The meltdown at the fourth reactor at the nuclear power plant in Chernobyl happened 30 years ago, but the wounds it inflicted on the world's psyche are still felt today.

Especially as fears of new leaks at Chernobyl increase as the concrete structure covering the reactor ages. It is estimated that only 3 percent of the reactor's radioactive contents escaped at the time.

And people's fears about nuclear power plants after the Chernobyl disaster were only exacerbated by the meltdown at Japan's Fukushima Dai-ichi nuclear power plant in March 2011 following a massive earthquake and tsunami.