Michele Kelemen

Secretary of State John Kerry sets off for what he calls "a long overdue" trip to Russia on Monday, and Syria is likely to top the agenda.

But U.S.-Russian relations are frosty these days. The U.S. is imposing targeted sanctions on Russian human rights violators, while Moscow is preventing American families from adopting Russian children.

President Obama has been hosting a series of visitors from the Middle East, and all of them have been urging the U.S. to get more involved in Syria.

They have included the emir of Qatar, Sheik Hamad bin Khalifa Al Thani, whose country has been arming rebel forces in Syria. Obama wants to see such aid go to moderates — but that requires more cooperation with partners like Qatar. Problem is, they don't always see eye to eye.

In the coming weeks, the Obama administration plays host to the leaders of several Middle Eastern nations, including the United Arab Emirates, Turkey, Qatar and Jordan.

They are coming, in part, to register their concerns about the ongoing violence in Syria and to nudge the Obama administration to do more to tip the balance in favor of the rebels trying to oust President Bashar Assad.

Secretary of State John Kerry describes himself as a recovering politician. He's just getting used to the fact that he can't speak quite as freely as he did when he was a senator.

"Each word means more, each relationship is played differently," he said in an interview with NPR, at the end of a nine-nation swing through Europe and the Middle East. "As a senator, you just don't have those stakes riding in it."

Secretary of State John Kerry is wrapping up his first official overseas trip to Europe and the Middle East. He's shifted U.S. policy on Syria, offering direct assistance to the opposition coalition and non-lethal aid to fighters. He's also offered Egypt's Islamist government $190 million to avert a budget crisis and he's warning Iran that talks can't go on indefinitely.

John Kerry sets off Sunday on his first foreign trip as secretary of state, visiting Europe and the Middle East.

One dominant theme of the trip will be how to resolve the crisis in Syria, where an estimated 70,000 people have been killed over the past two years. Kerry is portraying his trip as a listening tour, and he expects to hear a lot about Syria.

He told reporters recently that he wants to talk with U.S. allies about how to persuade Bashar Assad to agree on peace talks that would end the Syrian leader's bloody rule in Syria.

Bulgarian authorities say they have evidence the Lebanese militant group Hezbollah financed and carried out a bomb attack at a Black Sea resort town last year, killing five Israeli tourists and one Bulgarian citizen.

Bulgarian Foreign Minister Nikolay Mladenov said it was an extremely intensive investigation.

"The results of that investigation leads to a number of persons who are connected to the military wing of Hezbollah," he said.

Long before President Obama nominated John Kerry as the country's top diplomat, the Massachusetts senator was seen as a secretary of state in waiting.

He has been chairman of the Senate Foreign Relations Committee and has frequently jetted off to Afghanistan and Pakistan whenever the Obama administration needed him.