water, electrical and transportation systems. >> it's going to take some time for the airlines and cruise ships to put plans in place but they're geared up for that day. they know what their itineraries look like. >> reporter: congress would have to lift the embargo and that's resistance. >> it's another concession to a tyranny. >> reporter: wednesday filled the travel industry with hope that cuban tourism is around the corner. >> the most important thing yesterday is not just that we reestablished diplomatic relations but that it changed the ball game and the discussion in congress. >> reporter: renee marsh, cnn, washington. >> visiting havana is a remarkable thing. the city literally stopped in time. it looks like 1959 about everywhere. just ahead for us, nick valencia -- nic robertson takes us in the school where they were massacred by the taliban. we'll show you how it unfolded and what was left in its wake.