President Donald Trump's decision to not re-certify the Iranian nuclear deal marks yet another key moment in relations between Iran and America, which has seen decades of mistrust and mutual recriminations. Iranian President Hassan Rouhani mentioned many of them in his reaction to Trump's decision Friday night.

Here are some of the key moments of that relationship:

Catalonia, which may be poised to declare independence from Spain, is one of the powerhouses of the Spanish economy, buoyed by industry, research and tourism but burdened with heavy debt.

The Islamic State group may soon be defeated in Iraq and Syria but a "virtual caliphate" could be harder to conquer, experts and officials have warned. 

The jihadist propaganda machine will continue to exist in hidden corners of the dark web, inciting sympathisers to action, they say.

Just hours after Stephen Paddock unleashed a hail of bullets on a country music festival in Las Vegas, the Islamic State group issued a flurry of statements claiming the 64-year-old gunman as one of its own. The quick responsibility claim — discounted by FBI officials — is the latest in a series of dubious or seemingly fake IS claims, reflecting the extremists' eagerness to latch onto global attacks it can tout as its own as it fights for survival in its Mideast base.

Three years after it declared its so-called Islamic caliphate across huge swaths of Syria and Iraq, IS has lost most of the territory and is on the run in its few remaining bastions. Far from the confident propaganda it pumped out when it controlled a pseudo state, the group now justifies its losses to its supporters and urges them not to give up the fight.

For three days it was all smiles as the Palestinian prime minister held talks in Gaza with Hamas but as the symbolic visit draws to a close the real work for reconciliation is just beginning.

Former Iraqi president Jalal Talabani, who died Tuesday aged 83, was a charismatic leader of the Kurdish independence struggle who became Iraq's first non-Arab head of state.

For or against independence, Catalans are reeling from police violence during an independence referendum banned by Madrid but far from locking horns with the Spanish government, they call for dialogue.

The Islamic State group is under attack across the remaining parts of its self-proclaimed caliphate, but what happens to its thousands of fighters as their group loses grip on territory?

Facing multiple offensives, the jihadist group has lost the Libyan city of Sirte, Iraq's Mosul and Ramadi, and is now on the verge of being ousted from its former Syrian stronghold Raqa.

Ties between Palestinian rivals Fatah, a secular party, and the Islamist Hamas have been tense for a decade, at times erupting into deadly conflict.

The Islamic State group has lost swathes of territory in its self-declared "caliphate" in recent months, including its former Iraqi hub Mosul and most of its Syrian bastion Raqa.

It is under attack in its remaining enclaves in Iraq and is facing parallel Russian- and US-backed offensives in Syria. Here are the main battlefronts: