REUTERS - U.S. National Security Adviser John Bolton held talks in Moscow on Wednesday with Russian officials ahead of a meeting with Vladimir Putin, part of an effort to lay the ground for a summit between the Russian president and President Donald Trump.

REUTERS - Russian former double agent Sergei Skripal and his daughter were poisoned with a military-grade nerve toxin that had been left on the front door of their home in England, British counter-terrorism police said.