(ANSA-AFP) - FRANKFURT AM MAIN, MAR 4 - Germany's powerful Verdi union on Monday called on Lufthansa ground staff to stage a fresh two-day strike this week, the latest in a series of walkouts to hit Europe's largest economy. The strike action would impact passenger services from 0300 GMT on Thursday until 0610 GMT on Saturday, the union said in a statement, accusing management at the airline group of showing "no willingness" to come up with an improved offer. (ANSA-AFP).