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 SAN FRANCISCO The second in a series of storms slammed Northern California on Friday as heavy rain and strong winds knocked out power, tied up traffic and caused flooding along some stretches.The weather also may be behind the death of a Pacific Gas  Electric worker in West Sacramento who was killed after his truck crashed into a traffic signal pole during the stormy weather.Flights were delayed at San Francisco s airport, and in the city s affluent Pacific Heights neighborhood, traffic was blocked for hours after a large tree crashed down, smashing a car and obstructing a busy street.A flash flood stanley quencher  watch will remain in effect for most of the San Francisco Bay Area extending to the Santa Cruz Mountains throughout the weekend. A constant barrage of downpours could lead to stan stanley flask ding water and overflowing drains, said Diana Henderson, a forecaster with the National Weather Service in Monterey.                Dee Harmon removes debris from a gutter on the roof of The Church of Jesus Christ of Later Day Saints, during a break from the rain, Friday, N stanley cupe ov. 30, 2012, in Sacramento, Calif.                                                      AP Photo/Rich Pedroncelli                                        The North Bay was seemingly hit the hardest, as parts of Sonoma County received more than 7 inches of rain and areas in Napa County received nearly 6 inches, Henderson said.         It s not a super storm by any measure, but this is pretty significant,  Henderson said.  We should s Abkp Nixon s Winter White House Razed
 Most people don ;t know this, but NASA doesn ;t only work in exploring space. Its contribution to airplane technology stanley cup 鈥擭ational Aeronautics and Space Administration鈥攈as been crucial to the development of safer, faster, more efficient travel. These are their coolest future concepts鈥攕ome of which could enter service as soon as 2025.     These concepts have been developed working with private companies like Lockheed Martin, Northrop Gr stanley mug umman, and Boeing: This updated future aircraft design concept from NASA research partner Lockheed Martin shows a few changes from another concept seen eight images earlier in this gallery. It is a good example of how simulations and wind tunnel tests, conducted over time, generate data that tell researchers how to improve a design to achieve goals. The goals for a future supersonic aircraft are to produce a much lower-level sonic boom and to reduce emissions. The ultimate goal is to achieve a low enough boom that a current ruling prohibiting supersonic flight over land might be lifted. This concept of an aircraft that could fly at supersonic speeds over land is being used by researchers, especially at NASA   Langley Research Center, to continue to test ideas on ways to reduce the level of sonic booms. Its technolo stanley cups uk gies 鈥?the F-100-like propulsion system, a tail blister, and the overall shape 鈥?are combined to achieve a lower target perceived decibel level. This idea for a possible future aircraft is called a hybrid wing body