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