AMMAN (Reuters) - Syrian forces kept up attacks on Hama for a third day, residents said, while senators called on the Obama administration to impose tough new sanctions on Syria's energy sector. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=eSDkA7uZte0:tGYbs-PekNo:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=eSDkA7uZte0:tGYbs-PekNo:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/eSDkA7uZte0)