Staying at home, the Texans (still searching for their first win of the year) played a Week 4 intraconference match-up against the Miami Dolphins.  After a scoreless first quarter, Houston trailed early, as Miami kicker Olindo Mare got a 52-yard field goal.  Fortunately, the Texans would get a field goal of their own, with kicker Kris Brown getting a 32-yard field goal before halftime.  In the third quarter, Houston fell behind, as Mare kicked a 29-yard field goal for Miami.  In the fourth quarter, the Texans rallied against the Dolphins, as QB David Carr took the ball into the endzone from one yard out, then completed a 3-yard TD pass to WR Andre Johnson later in the quarter.  Mario Williams recorded his first career sack and added a half sack one play later. Afterwards, Houston would have to hold off a late rally by Miami.  Mare kicked a 22-yard field goal, and later got a touchdown, as QB Daunte Culpepper threw a 16-yard strike to WR Chris Chambers. Fortunately, the Texans prevented a two-point conversion when Mario Williams tipped the pass and held on to pick up their first win of the year.. How many field goals did Mare kick in the first half?