The timing and scope of sanctions relief are among crucial sticking points as Iran and the six major world powers resume talks in Vienna on Wednesday to discuss a nuclear agreement aimed at curbing Tehran's nuclear activities by June 30.
The U.S. Drug Enforcement Administration's chief will step down within weeks, the Obama administration said on Tuesday, as a congressional panel planned to examine whether DEA agents divulged secrets at sex parties that Colombian drug lords may have staged.
Online taxi firm Uber will comply with a German ban on its services using unlicensed cab drivers by lowering its fees so it becomes more like a ride sharing service.
A high-frequency trader was arrested in the United Kingdom over his alleged role in the May 2010 "flash crash" that briefly wiped out nearly $1 trillion in market capitalization, the first time authorities have blamed manipulation for the market turbulence.
