For the Czech prime minister Jan Fischer, the news came in a call hastily placed by President Barack Obama, shortly after midnight on Thursday in Prague. In Warsaw, his Polish counterpart Donald Tusk initially declined to answer the phone from the White House - as he guessed the purpose, from the unusual timing, and wanted to prepare a response. Mr Obama last week unveiled the most dramatic national security reversal of his presidency by scrapping his predecessor George W Bush's planned anti-ballistic missile shield in eastern Europe. With this volte face, the Obama administration has brought the curtain firmly down...