President Barack Obama walks down the steps of Air Force One at Andrews Air Force Base after returning from a foreign trip to Saudi Arabia, England and Germany. Photograph: AP/Susan Walsh

Barack Obama is in the final months of his presidency and keen to justify his domestic and international achievements before he leaves office. His fin(...)

Smoke pours from the  World Trade Center in New York after it was struck by two planes during  the September 11th attacks in 2001: 15 of the 19 people involved in the attacks were Saudi citizens. Photograph: David Surowiecki/Getty Images

Twenty-eight pages of the 2002 joint congressional inquiry into 9/11 lie in a guarded vault in the basement of the US Capitol building. Former presi(...)

Deputy Crown Prince Mohammed bin Salman, in Riyadh, where he announced his “Saudi 2030 Vision” plan. Photograph: Fayez Nureldine/AFP/Getty Images

Saudi Arabia’s deputy crown prince Mohammed bin Salman said he expects the value of Saudi Arabian Oil Co to exceed $2 trillion (€1.77 trillion) a(...)

Iraqi government forces under Islamic State slogans, in the town of Heet, which they are battling to retake from Isis jihadists. Photograph: Moadh Al-Dulaimi/AFP/Getty Images

It’s a diverse, fast-growing organisation with an expanding bureaucracy. Integrating its well-educated, multilingual workforce is a major headache, bu(...)

US president Barack Obama  stands next to Saudi Arabia’s King Salman during the summit of the Gulf Co-operation Council  in Riyadh on Thursday. Photograph: Faisal Al Nasser/Reuters

The United States will deter and confront aggression against Gulf Arab monarchies, which continue to have concerns about threats from Iran, President (...)

File photograph of US President Barack Obama and Queen Elizabeth II during a state banquet in Buckingham Palace in 2011. Photograph: Lewis Whyld/PA Wire

US President Barack Obama flies to London on Thursday with a mission: to persuade wavering British voters not to ditch membership of the European Uni(...)

DCU Business School has received official recognition from the world’s oldest accrediting body for business schools. File photograph: Cyril Byrne/The Irish Times

Dublin City University Business School has received official recognition from the world’s oldest accrediting body for business schools. The move pl(...)

A worker at Al-Sheiba oil refinery in the southern Iraq city of Basra. Photograph:  Essam Al-Sudani/Reuters

Oil prices remained slightly weaker after a meeting of major exporters ended without a deal to freeze production, but a major sell-off failed to mater(...)

Saudi Arabia’s minister of oil and mineral resources Ali al-Naimi (centre) arrives for the Opec meeting in the Qatari capital Doha. Photograph: Karim Jaafar/AFP/Getty Images

A deal to freeze oil output by Opec and non-Opec producers fell apart yesterday after Saudi Arabia demanded that Iran join in despite calls on Riyadh(...)

Ted Cruz: trying to stop Donald Trump getting the 1,237 delegates needed to secure the Republican nomination in July. Photograph: Brendan Bannon/The New York Times

Republican US presidential hopeful Ted Cruz won all 14 delegates at stake on Saturday in Wyoming. Mr Cruz is trying to prevent Mr Trump from obtaini(...)