"Star Wars" is going on 50 years of space magic and war drama, but not all of its big questions have been answered. We ...

Watch our Sir Meccanica perform an external weld on a spigot using a shop-made bore welding stand. How does controlled welding improve alignment and strength?

"When she became first lady, she took a back seat. But for many, she is the power behind the throne or a top adviser," said Carmen Arteaga, a doctor of political science.