flopped straight vs flopped nut straight, fold?

[Wesker1982]

I was pretty close to folding this, but didn't. Could I get away from this?

Full Tilt Poker Game #4190214797: $10 + $1 Knockout (31724387), Table 66 - 40/80 - No Limit Hold'em - 23:32:44 ET - 2007/11/15
Seat 1: PhilTheDrill7 (3,605)
Seat 2: ELCHINO7 (7,735)
Seat 3: calkidds (6,065)
Seat 4: Wesker1982 (1,840)
Seat 5: Hamon49 (1,045)
Seat 6: cannonzzzzz (2,140)
Seat 7: Foo101 (1,000)
Seat 8: izclozed (2,290)
Seat 9: honeyheadkid (2,930)
Wesker1982 posts the small blind of 40
Hamon49 posts the big blind of 80
The button is in seat #3
*** HOLE CARDS ***
Dealt to Wesker1982 [Js 9d]
cannonzzzzz calls 80
Foo101 folds
izclozed folds
honeyheadkid folds
PhilTheDrill7 folds
ELCHINO7 folds
calkidds folds
Wesker1982 calls 40
Hamon49 checks
*** FLOP *** [Qh Th Ks]
Wesker1982 bets 240
Hamon49 folds
cannonzzzzz calls 240
*** TURN *** [Qh Th Ks] [Kc]
Wesker1982 has 15 seconds left to act
Wesker1982 bets 400
cannonzzzzz raises to 800
Wesker1982 raises to 1,520, and is all in
cannonzzzzz calls 720
Wesker1982 shows [Js 9d]
cannonzzzzz shows [Jc Ac]
*** RIVER *** [Qh Th Ks Kc] [2s]
Wesker1982 shows a straight, King high
cannonzzzzz shows a straight, Ace high
cannonzzzzz wins the pot (3,760) with a straight, Ace high
Wesker1982 stands up
*** SUMMARY ***
Total pot 3,760 | Rake 0
Board: [Qh Th Ks Kc 2s]
Seat 1: PhilTheDrill7 didn't bet (folded)
Seat 2: ELCHINO7 didn't bet (folded)
Seat 3: calkidds (button) didn't bet (folded)
Seat 4: Wesker1982 (small blind) showed [Js 9d] and lost with a straight, King high
Seat 5: Hamon49 (big blind) folded on the Flop
Seat 6: cannonzzzzz showed [Jc Ac] and won (3,760) with a straight, Ace high
Seat 7: Foo101 didn't bet (folded)
Seat 8: izclozed didn't bet (folded)
Seat 9: honeyheadkid didn't bet (folded)