MIAMI GARDENS — We’re two weeks into Dolphins training camp and it’s still tough to draw lasting conclusions. The picture becomes more clear after this week when the Miami has two days of joint practices with Atlanta (Tuesday and Wednesday) capped by Friday’s preseason opener against the Falcons at Hard Rock Stadium. However, there are things to be gleaned from the second week of training camp, a time when the Dolphins put on the pads, just as there were things to learn from Week One. Here are a few Week Two observations: Defense shows sack skills The defense, while trying to fill numerous holes, turned in an impressive nine-sack performance in Saturday’s scrimmage.