Bill Gates

Kjetil Ree / Wikimedia Commons

Bill and Melinda Gates have each contributed $25,000 to the campaign to require background checks for most gun sales in Washington. The couple’s personal contributions late last month helped push the Yes on Initiative 594 campaign over the $1 million.

For centuries, biographers have relied on letters to bring historical figures to life, whether Gandhi or Catherine the Great. But as people switch from writing on paper to documenting their lives electronically, biographers are encountering new benefits — and new challenges.

Forbes magazine released its list of the 400 wealthiest Americans today Wednesday. Microsoft co-founder Bill Gates has once again topped the list of America's richest people. KUOW's John Ryan reports from Seattle.