WASHINGTON (AP) — President Barack Obama on Thursday is expected to address some of the thornier aspects of national security policy, including drone strikes, the prison at Guantanamo Bay and the dire threats Americans continue to face — even from fellow citizens.

LONDON (AP) — Financial markets around the world were roiled Thursday after Japanese stocks suffered their biggest slide since the country was hit by a devastating tsunami more than two years ago.

LONDON (AP) — A brave scout leader who may have prevented further violence has emerged as an unlikely hero in the apparent terror attack that left one man dead on the streets of London.