From the CNN Newsroom in Atlanta, Georgia, it is Thursday, I'am Carl Azuz and this is CNN Student News. First up today, we have more for you on President Obama's surprise trip to Afghanistan.

Afghan forces are expected to fully take over their country's security after most American troops leave in 2014.

While he was there on Tuesday, President Obama signed a deal about how the United States and Afghanistan will work together after that. He also talked about the challenges that are still ahead for U.S. forces.

I recognize that many Americans are tired of war. As president, nothing is more wrenching than signing a letter to a family of the fallen, or looking in the eyes of a child who will grow up without a mother or father.

Back in the United States, there were some different reactions to the president's visit to Afghanistan.

Former Massachusetts Governor Mitt Romney, the Republican Party’s presumptive presidential nominee , supported the trip. He said, quote, "Our troops and the American people deserve to hear from our president about what is at stake in this war."

But U.S. Senator James Inhofe, a Republican from Oklahoma, said this visit was more about politics, quote,

"Clearly this is campaign related. This trip to Afghanistan is an attempt to shore up the president's national security credentials ," he said.

One of Governor Romney's primary opponents is officially dropping out of the Republican race. Former U.S. Speaker of the House Newt Gingrich announced yesterday he is suspending his campaign. Gingrich, who won primary contests in South Carolina and Georgia, thanked his supporters. He also expressed his support for Governor Romney.

A couple days ago we had a story on Chinese activist Chen Guangcheng. He had escaped from house arrest, and there were questions about where he was. The answer was in the U.S. embassy in China.

Secretary of State Hillary Clinton is in Beijing right now. She's there for a meeting about global issues like economy and technology. But the news that Chen was at the U.S. embassy could overshadow that meeting. Chen has spoken out against China's government over human rights issues. That's something U.S. officials have also raised concerns about.

Chen left the U.S. embassy to go to a hospital on Wednesday, but there are conflicting reports about how he left.

U.S. and Chinese officials say it was Chen's decision. One of his friends says Chen was forced to leave. Later Wednesday, Chen told CNN that he wants to leave China. He said he's worried his life could be in danger if he stays.