Studies have also found that early environmental enrichment including better nutrition, physical exercise and cognitive stimulation enhances later brain functioning in children and reduces adult crime.

WSJ: Neurocriminology: Inside the Criminal Mind

The nuclear watchdog agency asked Tehran to explain the presence of particles of enrichment levels up to 27% found in an analysis of environmental samples taken in February at the Fordo fuel enrichment plant near the city of Qom.

CNN: Report: Putin, Ahmadinejad to meet before nuclear talks

's International Atomic Energy Agency asked Iran to explain the presence of particles of enrichment levels of up to 27%, found in an analysis of environmental samples taken in February at the Fordo fuel enrichment plant near the city of Qom.

CNN: Talks over Iran's nuclear program resume in Moscow