The uproar over foreign control over American interests was blamed for the break-up of one nearly successful IT security merger. Check Point Software Technologies Ltd., which is based in Israel, and Maryland-based Sourcefire broke off a $225 million merger that came under intense scrutiny by the Committee on Foreign Investment in the United States (CFIUS). "Basically we agreed to withdraw applications based on a couple of things," said Michelle Perry, chief marketing officer for Sourcefire. "First the complexities of the overall CFIUS process, the lengthy ongoing delays and the current climate for international acquisitions.