Update: Afghan policewoman who shot and killed a US civilian adviser has been taken into custody - @BBCNews' @BSarwary

Afghan government to shun US talks with Taliban, president says - @Reuters

US immigration bill is 'dead on arrival' in the House, Republican senator says - @NYDNpolitics

US State Department: No US-Taliban talks are scheduled - @AFP

President Karzai, US Secretary of State Kerry have defused row over Afghanistan peace talks in Doha, a spokesman tells @bbclysedoucet

FBI director says he does not think they could have prevented Boston bombing even if they had known Tamerlan came back to US from Russia - @KellyO

Swiss parliament rejects deal to expose US tax-dodgers - @AFP

FBI director tells Senate the bureau uses drones inside the US but rarely - @KellyO

More: President Obama says US will reduce deployed nuclear weapons by 'up to a third' - Live video

Obama calls for reduction of nuclear stockpiles, including negotiated cuts with Russia - @AP

@doberah tweeted:

Merkel stresses German, not US, actions leading to fall of Wall #ObamainBerlin http://t.co/ZwLToHFar1

Update: Afghan policewoman who shot and killed a US civilian adviser has been taken into custody - @BBCNews' @BSarwary

Breaking News

Update: Afghan policewoman who shot and killed a US civilian adviser has been taken into custody - @BBCNews' @BSarwary

Afghan government to shun US talks with Taliban, president says - @Reuters

US immigration bill is 'dead on arrival' in the House, Republican senator says - @NYDNpolitics

US State Department: No US-Taliban talks are scheduled - @AFP

President Karzai, US Secretary of State Kerry have defused row over Afghanistan peace talks in Doha, a spokesman tells @bbclysedoucet

FBI director says he does not think they could have prevented Boston bombing even if they had known Tamerlan came back to US from Russia - @KellyO

Swiss parliament rejects deal to expose US tax-dodgers - @AFP

FBI director tells Senate the bureau uses drones inside the US but rarely - @KellyO

More: President Obama says US will reduce deployed nuclear weapons by 'up to a third' - Live video

Obama calls for reduction of nuclear stockpiles, including negotiated cuts with Russia - @AP

Merkel stresses German, not US, actions leading to fall of Wall #ObamainBerlin http://t.co/ZwLToHFar1