After the Bills offense failed to score on the opening drive, a Brian Moorman punt pinned the Dallas Cowboys at the 2-yard line. Tony Romo's first pass attempt of the night was intercepted by George Wilson, who ran it back 25 yards for a Bills TD. On the ensuing possession, Romo threw his second interception to Angelo Crowell. However, Buffalo was unable to capitalize on the turnover. In the second quarter, Romo completed a 23-yard touchdown pass to TE Jason Witten, tying the game at 7. But Buffalo's Rian Lindell kicked a field goal soon after to retake the lead at 10-7. On the next drive, Romo was again pinned inside the Dallas 5-yard line when Bills' defensive lineman Chris Kelsay blocked a pass and caught his own deflection in the end zone. The TD extended the Bills' lead 17-7. The Bills kicked off. Dallas began to drive until yet another Romo pass was intercepted, this time by Jabari Greer. It marked Romo's fourth interception of the night and, after a missed 54-yard field goal attempt, the second time the Bills offense would fail to score after a turnover. On the final Dallas drive of the half, Romo completed a 29-yard pass with 3 seconds left to set up a 47-yard field goal by Nick Folk. Halftime: Buffalo 17, Dallas 10. Down by one touchdown, Dallas' first drive of the second half resulted in a second Folk field goal of 29 yards. But on the ensuing kickoff, Buffalo's T. McGee returned the ball 103 yards for a TD, giving the Bills an 11-point lead (24-13). Early in the fourth quarter, Folk added 3 more points to Dallas' score. The following drives were marred by turnovers with Romo fumbling the ball, which Buffalo recovered. The Bills drove down field until Dallas' Terrence Newman intercepted an Edwards' pass, the first of the game for the rookie Bills QB. Then, with Dallas in scoring range, Romo was picked off for the franchise record-tying 5th time. So neither team was able to score as a result of the turnovers. Then, with 3:45 left in the fourth quarter, Dallas' offense drove 80 yards for a touchdown on a pass from Romo to Patrick Crayton. A two-point conversion to tie the game failed. With 20 seconds remaining, Folk executed an on-side kick, which was recovered by Tony Curtis for Dallas. With no timeouts and 18 seconds remaining, Romo passed twice toward the sidelines for 4-yard and 8-yard gains - enough to set up a long field goal attempt to win the game. Folk kicked. It was good, but the Bills had called a timeout. Dallas again set up to kick, and again the rookie kicker split the uprights for a career-high, 53-yard field goal and his first game-winning field goal in the NFL. The 12 unanswered points in the 4th helped Dallas improve to 5-0 and dropped the Bills to 1-4. The Cowboys improved to 5-0, along with becoming the very first team to win a game with a &#8722;5 turnover margin.
Question: What extended the Bills' lead 17-7?
Answer: TD