Iran Enriching Uranium To 60%, Highest Level Ever

Iran has increased its uranium enrichment to 60%, following an attack on a nuclear site. This move occurs amid discussions with world powers about rejoining the US in the nuclear deal, which aims to limit Iran's nuclear capabilities. The deal restricts enrichment to under 4%, while 60% is a significant increase, it remains below the 90% needed for weapons-grade material.

What events led to the current situation regarding Iran's nuclear program?

What is the difference between 60% and 90% uranium enrichment in terms of nuclear weapons?