Filed at 4:21 p.m. ET WASHINGTON (AP) -- Actor Mike Farrell, armed with a letter signed by 70 fellow celebrities, urged senators on Tuesday to vote against a plan to bury the nation's nuclear power waste at Nevada's Yucca Mountain. Calling claims of safety for the Yucca site ``technically unfounded,'' the former ``M-A-S-H'' star said transporting the 77,000 tons of waste to Nevada would create ``an enormous target for someone who has an ill intention.'' Farrell, who now plays a veterinarian on the NBC series ``Providence,'' delivered the letter a day before the Senate Energy and Natural Resources Committee plans...