Switzerland's parliament is opening a special session Tuesday to scrutinise the state-imposed takeover of Swiss bank Credit Suisse by rival UBS — and possibly considering strengthening the legal arsenal to better gird against financial blowups. The debate could run up to three days, with expectations that lawmakers will voice — and need to iron out — disagreements over the 3 billion Swiss franc ($3.25 billion) fusion of the country's top two banks, a thunderclap for a country that prides itself on finesse and acumen in finance.