By ELLEN KNICKMEYER and JOCELYN GECKER, Associated Press WASHINGTON (AP) — Trees toppling onto above-ground power lines spark wildfires, more than 1,000 of them in the last decade in California alone. The wires snap in blizzards and hurricanes, causing dayslong outages. Everywhere, power poles topple in all kinds of disasters, blocking escape routes. Around the U.S., dealing with the vulnerability