Russia says it pulled out of nuclear talks with U.S officials scheduled for Cairo this week owing to toxic anti-Russian behaviour from the United States.
The United States Department of Defence is considering a Boeing proposal to supply Ukraine with cheap, small precision bombs fitted onto abundantly available rockets.
Russia says it hopes to secure a prisoner swap with the United States to return convicted Russian arms trafficker Viktor Bout, known as the "Merchant of Death", in an exchange that would likely include U.S. basketball star, Brittney Griner.
U.S. Central Intelligence Agency Director William Burns has held talks with Sergei Naryshkin, head of Russia's SVR foreign intelligence service in the Turkish capital Ankara on the consequences of any use of nuclear weapons.