>> the debate over this is certain to continue, with the tax breaks first established under president bush set to expire at the end of this year. the second of four congressional hearings will take place on capitol hill today. in the growing scandal over wasteful spending by a government agency. current and former officials from the general services administration will face a new round of questioning this morning, over 2010 conference in las vegas. it follows a tense hearing yesterday where as nbc's lisa myers reports, questions about possible kickbacks and allegations of bribery came up. >> what happened in vegas ended up on capitol hill. and the gsa official in charge of the lavish conference, jeff neily, asserted his right to remain silent six times. >> mr. chairman, i respectfully decline to answer any questions here today based upon my fifth amendment constitutional privilege. >> reporter: but neily seemed less reticent about his vegas