Iran's suspect nuclear program will again be in the spotlight this weekend when negotiators from Iran and six international powers meet in Istanbul.
Iran was reluctant to have Turkey host the meeting, reflecting Iran's growing unhappiness with Turkish foreign policy moves, especially its call for regime change in Syria, Iran's key ally in the Arab world.
Analyst and columnist Yavuz Baydar says Turkey has stuck its neck out for Iran in the past, defending what it calls Iran's peaceful nuclear energy program and even voting against U.N. sanctions on Iran two years ago.
As North Korea reaches the final stage of preparations for a long-range rocket launch, concern is growing that it is in the early stages of preparing its underground test site for another nuclear explosion.
Pyongyang established the pattern three years ago when it tested a similar rocket and then followed it a month later with a nuclear test.
This time around, there may be a more urgent need to test a nuclear device. The bomb is very likely the result of a significant expansion of North Korea's nuclear weapons program.