The crash of Metrojet flight 9268 shortly after take-off from Sharm el-Sheikh understandably raises concerns about security and screening procedures at that airport.

From what was known about the crash by mid-November, the Airbus A321 broke up suddenly inflight with no distress calls given or any indication of a technical problem.

Top UK government officials made strong statements suggesting an explosive device could have brought down the Russian airliner. Russian officials initially dismissed any bomb theory and, disgracefully, even finger-pointed to airline maintenance when it was far too soon to have any sound information on the cause of the crash. But Russia later seemed to accept that a terrorism act was a possibility and it followed other countries in suspending airline flights to and from Egypt until the cause of the crash is determined.

That was a sensible precaution.

What’s necessary now is a continuation of sensible, level-headed decisions on airport security and not a hot-headed over reaction.

First, investigators need to be allowed to do their work and determine the cause of the crash.

Second, it should be recognized that there have been enormous achievements made in security and screening across the global air transport system since 9/11.

Even if it is established that a failure occurred at Sharm el-Sheikh, any response should be focused on the processes at that airport and the specific, local remedies needed.

New blanket security regulations, particularly if introduced before all the facts are established, could at best make air travel unnecessarily more of a hassle and at worst have unintended consequences.

The dark truth is that the Paris terrorist attacks were focused on soft targets such as restaurants, and concert and sports venues in part because the global commercial air transport system is no longer easy to penetrate. If it is established that there are weak points in the system, then those must be addressed. Where individual airports are found not to be meeting ICAO security standards, then efforts must be redoubled to bring them in line.

But where the system is working—and all evidence indicates that is the case across the vast majority of airports—then a patchwork of new rules won’t make the system more secure.