The fifth anniversary of the Arab Spring events is marked; Las Vegas is host to the next Republican presidential debate and world powers step up diplomacy on Syria.

US Secretary of State John Kerry meets with Gulf leaders; the first Republican presidential debate is held and the 25th anniversary of the Iraqi invasion of Kuwait is marked.

The Republican National Convention takes place in Cleveland, the African Union wraps up a summit in Rwanda, and two years pass since the downing of Flight MH17.

Industrial overfishing and other man-made factors have pushed one-third of the world’s fish stocks to be threatened with extinction, and many other species are not far behind. The problem represents …

A preview of world events in the coming week from CFR.org: UN nuclear inspectors visit Iran; a Republican primary is held in Florida; and Prime Minister Gilani's Supreme Court case resumes in Pakista…