Berlin will allow exports of German tanks to Ukraine if U.S. sends its tanks -sourceBERLIN, Jan 18 (Reuters) - Germany will allow German-made tanks to be sent to Ukraine to help its defense against Russia if the United States agrees to send its own tanks, a German government source told Reuters.Attention is focused in particular on Germany, which has veto power over any decision to send its Leopard tanks, fielded by NATO-allied armies across Europe and widely seen as the most suitable for Ukraine.U.S. officials, speaking on the condition of anonymity, said President Joe Biden's administration is next expected to approve Stryker armored vehicles for Ukraine but is not poised to send its own tanks, including the M1 Abrams.This week, Britain raised the pressure on Berlin by becoming the first Western country to send Western tanks, pledging a squadron of its Challengers, but the Leopards are seen as the best choice to supply Ukraine with a large-scale tank force.The Wall Street Journal, citing senior German officials, first reported Berlin's condition on tanks earlier on Wednesday."