The 33 Japanese dive bombers circled to attack from upwind, and thus did not begin their dives from until three to four minutes after the torpedo planes began their attacks. The 19 "Shōkaku" dive bombers, under Takahashi, lined up on "Lexington" while the remaining 14, directed by Tamotsu Ema, targeted "Yorktown". Escorting Zeros shielded Takahashi's aircraft from four "Lexington" CAP Wildcats which attempted to intervene, but two Wildcats circling above "Yorktown" were able to disrupt Ema's formation. Takahashi's bombers damaged "Lexington" with two bomb hits and several near misses, causing fires which were contained by 12:33. At 11:27, "Yorktown" was hit in the centre of her flight deck by a single , semi-armour-piercing bomb which penetrated four decks before exploding, causing severe structural damage to an aviation storage room and killing or seriously wounding 66 men, as well as damaging the superheater boilers which rendered them inoperable. Up to 12 near misses damaged "Yorktown"s hull below the waterline. Two of the dive bombers were shot down by a CAP Wildcat during the attack.