Obama limits use of drone strikes, discusses closing Guantanamo
Police search homes after British soldier's murder
UK officials urge calm, unity following attack
Diplomats struggle to bring Syrian sides together
Eyewitness describes encounter with London attacker
Paul McCartney offers support for Pussy Riot
Britain to "stand against violent extremism and terror"
Shock in London after suspected terror attack
Pakistan bomb kills 13
Solar plane set to make flight history
NY rep rebounds from scandal with bid for mayor
Oklahoma tornado: the student's tale
