Thomas Kleine-Brockhoff says deal in emergency EU summit promising , crisis not over . He says Sarkozy , Merkel faced huge task in uniting eurozone leaders on plan for Greece . He says the markets are likely to poke holes in deal ; there 's no telling what banks will do next . Comment: The U.S. should come to rescue next and support upping IMF 's financial involvement .
Thomas Kleine-Brockhoff says deal in emergency EU summit promising , crisis not over . He says Sarkozy , Merkel faced huge task in uniting eurozone leaders on plan for Greece . He says the markets are likely to poke holes in deal ; there 's no telling what banks will do next . Writer : The U.S. should come to rescue next and support upping IMF 's financial involvement .