US President Barack Obama paid warm tribute to South Africa's Nelson Mandela for his 95th birthday on Thursday, which the anti-apartheid icon will spend in hospital recovering from a lung infection.
Federal Reserve Chairman Ben Bernanke reiterated Wednesday that the Fed is nowhere close to raising interest rates, assuring markets that the US easy money tap would not soon dry up.
Rolling Stone defended Wednesday a cover story on Boston bombing suspect Dzhokhar Tsarnaev, which triggered angry claims that it was "glamorizing terrorism" and calls to boycott the US magazine.
Medical research that uses animals to test therapies for human brain disorders is often biased, claiming positive results and then failing in human trials.
President Vladimir Putin on Wednesday said Moscow's relations with Washington outweighed the "squabbles" over a spying scandal revealed by US fugitive Edward Snowden, who has applied for asylum in Russia.
A group of 83 passengers aboard an Asiana Airlines flight which crash-landed in San Francisco has filed a lawsuit seeking millions from the aircraft's manufacturer Boeing.
Brazil said Washington had not sufficiently responded to Brasilia's request it explain the alleged US electronic spying disclosed by rogue intelligence leaker Edward Snowden.
US regulators on Monday approved the first brain wave test for attention deficit hyperactivity disorder, saying it may improve the accuracy of diagnoses by medical experts.
US Secretary of State John Kerry headed to Jordan Monday on his sixth trip to the region as he tries to push Israelis and Palestinians back to peace talks.
Ten weeks before German elections, Chancellor Angela Merkel's centre-left rivals have gone on the attack over reports of sweeping US online surveillance and German cooperation.
Alleged Boston bomber Dzhokhar Tsarnaev is seeking to beef up his legal team by hiring an additional attorney who specializes in death penalty and terrorism cases.
US banking giant Citigroup Monday reported better-than-expected quarterly earnings as strong securities and investment banking revenues helped offset weaker mortgage business and continued US consumer caution.