Exxon's CEO will speak at a summit in Moscow despite requests from the U.S. government to isolate Russia over its actions in Ukraine.
Supply of Russian gas to Europe will continue through Ukraine as usual unless the latter diverts it during transit.
Russia incensed over statements by acting Ukranian foreign minister describing Putin in unflattering terms.
The aerial images reportedly show Russian T-64 tanks moving near the Ukrainian border.
The protest comes after eastern separatists downed a Ukrainian military plane.
The bomb contained five grenades and metal nuts, according to a security source.
Ukraine and the U.S. claim Russia allowed three tanks and several rocket launchers to enter Ukraine on Thursday.
The State Department called the move "unacceptable."
Mariupol, which has changed hands several times in weeks of conflict, is strategically important because steel is exported through the port.
Violence heated up in Ukraine after Petro Poroshenko was is elected president. And in Donetsk, leader Pushilin claimed his bus was blown up.
Brazil will be desperate for a positive start to their home World Cup when they face Croatia in the tournament’s opening match.
China said its fiscal May spending rose almost 25 percent in May.
The World Bank reduced its forecast for global economic growth to 2.8 percent this year, down from a January projection of 3.2 percent.
The forecasts assume tensions in Ukraine will persist this year but won't worsen.
The stealth bombers had never been based in Europe before. Now, they sit just three hours from the Russian border.
The talks will continue late Tuesday or early Wednesday, the EU's energy commissioner said.
In her new memoir, "Hard Choices," the former Secretary of State's views seem prescient on Russia, Syria and Egypt.
Russian and Ukrainian representatives reportedly met three times over the past two days, and discussed ways to end the violence in the region.
The swearing–in process follows Poroshenko’s meeting with Putin on Friday, with hints of a cease-fire.
Ukraine's new President Petro Poroshenko has far more on his agenda than dealing with pro-Russian separatists.
The direct talks between the leaders are the first since the Ukrainian crisis erupted.
The informal meeting was the first in-person discussion between Obama and Putin since the Ukraine crisis began in March.