Russia said any U.S. sanctions imposed on Moscow over the crisis in Ukraine will boomerang back on the United States.
Arseniy Yatsenyuk, prime minister of Ukraine: "Crimea was, is, and will be an integral part of Ukraine. No concessions. Full stop."
Scots stand to lose out on their pension pots if they opt for independence in a vote this September, a senior British minister warned.
Putin rebuffed a warning from Barack Obama over Moscow's military intervention in Crimea, saying Russia could not ignore calls for help from ethnic Russians in Ukraine.
Joshua Klein, author of Reputation Economics, discusses how emerging technology is changing commerce as online reputation and data allow companies to tailor their offer to individuals.
Richard Mallinson, geopolitical analyst at Energy Aspects, discusses the impact the crisis in Ukraine could have on the price of oil and gas, as major pipelines linking Russia to Europe run through Ukraine.
Yuriy Lutsenko, leader of the Ukrainian Lidan Movement, casts doubts on the new Ukrainian government's ability to change the system and fight corruption.