AK suited in BB. Flop hits nothing. What's the move here?

[Ontario_Tory]

18 people left in a $3 MTT on stars...

No special reads on CO. What's the move?



PokerStars No-Limit Hold'em Tourney, Big Blind is t6000 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB (t303696)
Hero (t159280)
UTG (t66752)
UTG+1 (t74962)
MP1 (t151049)
MP2 (t88500)
MP3 (t38675)
CO (t101529)
Button (t139984)

Preflop: Hero is BB with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">CO raises to t12000</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t30000</font>, <font color="#666666">1 fold</font>, CO calls t18000.

Flop: (t61800) 4[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>