celia hatton shows us how they shed new light on beijing's approach to execution. and basketball brawl. bow cynthia bowers has the blow-by-blow of a rivalry that got way out of hand. >> this is the "cbs evening news" with russ mitchell. captioning sponsored by cbs russ mitchell is off tonight. the 12th republican presidential debate last night was also the next-to-last debate before the first votes are cast in the iowa caucus, which is 23 days out. dean reynolds in des moines has more on the high-stakes free-for-all. >> as the latest king of the republican hill, newt gingrich came under attack, but mitt romney took a lot of punch, including some of the self-inflicted variety, for example, when he challenged the truth of an attack by rick perry, romney offered to put money on the table. >> rick, i'll tell you what, $10,000, $10,000 bet? >> i'm not in the betting business. >> critics scoffed that it was a sign of romney's wealth and elitism, noting that few iowans could pony up $10,000 to move a point. >> those type of elitist tactics may work. >> then there was romn