Twitter to delete posts if countries request it

(CNN) -- Online social networking site Twitter said Thursday it will begin deleting users' tweets in countries that require it -- but it will still keep those deleted tweets visible to the rest of the world.The move is significant because, until now, the only way Twitter could comply with countries' limits was to remove the content globally.Twitter said it will now delete tweets only "reactively" and on a case-by-case basis and will let the affected user know why the content is being withheld."We hold freedom of expression in high esteem and work hard not to remove Tweets," Twitter spokeswoman Jodi Olson wrote in an e-mail to CNN."And just to be clear, this is not a change in philosophy and there are still countries to which we will not go," she said.As examples of countries where tweets may have to be restricted, Twitter mentioned Germany and France, which ban pro-Nazi content.

Students teach during "Project Lead the Way" tour

MILWAUKEE -- Two dozen school leaders from across Wisconsin paid a special visit to Milwaukee's Escuela Vieau School Thursday, one of the leading MPS schools taking part in the "Project Lead the Way" program.Instead of learning from the teachers, eighth graders from Escuela Vieau School taught school leaders the basics of engineering. "They're seeing the kids work in robotics, electronics and also new projects showing weatherization and energy conservation," Lauren Baker, Milwaukee Public Schools Technical Education Coordinator said.25 educators toured the school's new technology lab, where students design their way through the learning process. "We have to make a car, so we started out with the pull toy.

Electronic lighting options

Technology is forever changing, and electronic lighting is no exception.