US slaps duties on Mexican sugar imports

Dispute highlights trade friction despite Nafta agreement

UAE and Egypt warned over Libya raids

Fears outside interference exacerbates divisions

BK and Tim Hortons soar on merger news

Shares surge for groups after talks revealed over possible tie-up

Bullard says Fed needs to alter guidance

Debate turns to how to discuss eventual interest rate rise

Pfizer weighs options on AstraZeneca bid

Three months after deal collapsed, rules allow possible renewal

US journalist freed by al-Qaeda linked group

Freeing of Peter Theo Curtis follows murder of Foley

Obama orders review of militarised police

Funeral for Ferguson teen shot dead by police is Monday

Job concerns dominate Jackson Hole

Uncertainty over data on labour market stymies central bankers

China rejects US claim of ‘provocation’ over intercept

Jet ‘dangerously’ intercepted US surveillance plane, says Washington

WTO rules against Argentine import curbs

Recent restrictions ruled as violating global trade regulations

Yellen debuts with sense of balance

But shift in stance still raises possibility of earlier rates rise

White House resists Pentagon’s Iraq advice

US holds off from extending reach of campaign to Syria

Yellen highlights labour market dilemma

Fed chair shifts stance on jobs in Jackson Hole speech

Former governor’s trial transfixes Virginia

Most compelling storyline is breakdown of couple’s marriage

US signals escalation in Isis fight

Militant group ‘beyond anything we’ve seen’, says defence secretary