Originally Posted by
jib71
Am I missing something? What is it about the Boston Marathon incident that makes this necessary?
The US lost track of the the bomber's departure from the US for Russia, with US having to rely upon Russia to correct the record and indicate how long he was in Russia and where in Russia he had gone on the same trip. Some think that if his flight departure details were known, then he may have been intercepted at some point before the bombing. Also, some think that (more) exit controls should be in place to facilitate the revocation of asylum/refugee status if a person granted such status in the US goes to the foreign country of citizenship. Hope that helps indicate why this has come up in connection with those attacks.
By the way, even as Russia had warned the US about that individual, the Russian government didn't really do much of anything to him on his entry to or exit from Russia despite previously having warned the US that the individual was an extremist of some sort.
Russia has entry/exit controls, knew his Russian passport details, has a blacklist system in place, and yet he was more or less left alone on his trip to/from Russia.