more now on our top story, and america s top diplomat has warned against imposing sanctions against russia too early, over its threats towards ukraine. the ukrainian president has called for sanctions to be imposed now, but the us secretary of state said that could have a detrimental effect. russia denies it s planning any invasion, but it has seized ukrainian territory before and it has an estimated 100,000 troops deployed near its borders. president biden has threatened russia s leader with measures like none he s ever seen if ukraine is attacked. so what would they involve? the ultimate economic hit would be to disconnect russia s banking system from the international swift payment system, effectively cuting the country off from the global economy. another key threat is to prevent the opening of russia s nord stream 2 gas pipeline in germany, and approval for that is currently being decided by germany s energy regulator. there could also be measures targeting russia s so