Blocking Outside the Antenna

[bob jenkins]

Can front row B1 block a ball that is on A's side of the net but is outside the antenna? Does it matter whether B's hands pass inside or outside the antenna?

In one particular play, team A had completed it's third hit and the ball was obviously going to pass outside the antenna, but before it did so, B reached over outside the antenna and caught the ball (why? I don't know.)

FED rules, if it matters (and I think it does)