US President Barack Obama spoke to President Vladimir Putin on Friday and thanked him for Russia's anti-terror help after bomb attacks in Boston blamed on two men of Chechen origin.
The Group of 20 economic powers pledged "ambitious" steps Friday to spur growth and job creation to get the crisis-scarred global economy back on track.
A trail of blood led to accused Boston Marathon bomber Dzhokhar Tsarnaev as he hid inside a boat after eluding one of the biggest manhunts ever staged in the United States.
Top US diplomat John Kerry said he would mull ways to deepen US engagement in the Arctic amid pleas from lawmakers to name America's first ambassador to the resource-rich region.
North America's pipeline network must be radically redrawn with new links such as Keystone XL to meet growing Canadian oil output, or risk a blow to the country's economy.
Advanced and developing countries alike voiced worries over fragile global growth, eurozone stagnation and the swamp of excess monetary liquidity as the IMF and World Bank spring meetings kicked off.
Rescuers in Texas on Thursday combed through rubble in a painstaking search for survivors after a massive blast at a fertilizer factory killed as many as 15 people and destroyed dozens of homes.
Jubilee USA Network, a debt-relief organization, on Thursday criticized the International Monetary Fund for using a "double standard" in prescribing austerity measures to troubled economies.
The FBI released pictures and video on Thursday of two men suspected of planting the Boston marathon bombs, appealing for help to identify the pair who were carrying large backpacks.
A gunman shot and seriously wounded a Massachusetts Institute of Technology police officer in an eruption of gunfire at the prestigious university late Thursday.
A letter addressed to President Barack Obama tested positive for ricin, and authorities arrested a suspect, stoking alarm in Washington on Wednesday after an earlier scare over poisoned mail.
More Guantanamo detainees have joined a growing hunger strike at the reviled US military prison, with nearly a third of the 166 war-on-terror suspects participating.
A US man whose estranged wife cut off his penis accused her Wednesday of effectively murdering him, recounting his horror as she severed the organ and threw it into a garbage disposal machine.
Bristling with anger, President Barack Obama branded Wednesday's defeat of his gun reform drive in the US Senate as "shameful," and accused lawmakers of caving in to the powerful firearms lobby.
Some 60 to 70 people were killed and hundreds were injured by an explosion at a fertilizer plant outside Waco, Texas, local media reported, citing the local emergency manager.
North Korea laid down rigid pre-conditions Thursday for any talks with Seoul or Washington, including the withdrawal of UN sanctions and a guaranteed end to South Korea-US joint military drills.