BERLIN — Germany and other European countries pledged on Thursday to provide Ukraine with viable security guarantees should negotiations on a ceasefire take place after US President Donald Trump takes office. In a so-called Berlin Declaration, the foreign ministers of Germany, France, Poland, Italy, Spain and the UK, as well as the EU's foreign affairs chief, Kaja Kallas, outlined their continued support for Kiev. "We are committed to providing Ukraine with ironclad security guarantees,