The number of Americans filing new claims for jobless benefits tumbled to a 15-year low last week and consumer spending rose in March, signs the economy was regaining momentum after stumbling badly in the first quarter. Initial claims for state unemployment benefits fell 34,000 to a seasonally adjusted 262,000 for the week ended April 25, the lowest reading since April 2000, the Labor Department said. The four-week moving average of claims, considered a better measure of labor market trends as it irons out week-to-week volatility, fell 1,250 last week to 283,750.