Greater EU unity has been a U.S. cause for 30 years and more.

CNN: Analysis: Battles ahead over U.N. role

The crew will also troubleshoot -- and with some luck, fix -- the NASA communication gear attached to the U.S.-built Unity module.

CNN: liftoff

The meaning of the holiday changed over time, becoming a David versus Goliath tale among Mexican immigrants in the 1930s and embodying U.S.-Mexico unity during World War II and Chicano Power in the 1960s and 1970s, Hayes-Bautista said.

CNN: STORY HIGHLIGHTS

Another asset that would have worked in the U.S. cardinals' favor is a lack of unity among Italians that has manifested itself in past conclaves, said the U.S. cardinal.

WSJ: With Speech, Cardinal Set Path to Papacy

It is true that I am going to be insisting on a unity of purpose on the part of all branches of the U.S. government that reflects the enormous sacrifices that are being made by the young men and women who are there.

WHITEHOUSE: President Obama & President Medvedev Joint Press Conference | The White House

Iraq's parliament is preparing to tackle key legislation in response to U.S. benchmarks aimed at measuring Iraq's progress toward national unity.

CNN: Sunni Arab bloc rejoins Iraqi parliament