WSJ.com - Check Point Software Withdraws Deal Over U.S. Security Concerns

"Leading Israeli software company Check Point Software Technologies Ltd. abandoned plans to buy smaller U.S. rival Sourcefire Inc. for $225 million because of security objections raised by the Bush administration.
Check Point Ltd. formally withdrew its proposal near the conclusion of a rare, full-blown investigation by a U.S. review panel after the Ramat Gan, Israel-based company was told U.S. officials feared the transaction could endanger some of government's most sensitive computer systems.
The investigation was carried out by the same U.S. review panel that approved the now-abandoned ports deal involving Dubai-owned DP World."