Rallies and peace marches are being held around the world today to commemorate the first ever nuclear attack, on the Japanese city of Hiroshima in 1945.

More than 140 thousand people were killed by the bomb and thousands more suffered radiation affects for years.

Despite the horror of that event nuclear weapons still pose a threat, with more than 26 thousand warheads on standby around the globe.

Nine nations currently posses weapons but only 5 of those are signatories to the non proliferation treaty.

There have been calls this week for a renewed effort to disband all nuclear weapons through the creation of a new anti nuclear commission.

2SER's Paige Nguyen spoke with Professor John Langmore from the International campaign to abolish nuclear weapons.