When not funneling in and out of the command center at West High School, federal, state and local officials spent Tuesday outside using shovels to methodically search for clues.

CNN: Powerful Texas blast left nearly 100-foot-wide crater

With the bulk of its 34 million workforce without even high-school diplomas, college-trained job hunters command hefty premiums.

CNN: ASIANOW - Asiaweek

In high school, Noamkulaleko was told she had an excellent command of English.

NPR: A South African Student Looks for Balance

While Alicia Keys and Jennifer Hudson (the latter singing with the choir from Sandy Hook Elementary, the Connecticut school where 20 children were killed in December) also will perform, Knowles will command the stage once the San Francisco 49ers and Baltimore Ravens break for halftime.

CNN: STORY HIGHLIGHTS

In Hambrecht's view consumers' and policymakers' command of chemistry is frequently limited to vague memories of exploding beakers and funny smells in a high school laboratory.

FORBES: Chemistry Lesson