Kerry received his second Purple Heart for action on the Bo De River on February 20, 1969. The plan had been for the Swift boats to be accompanied by support helicopters. On the way up the Bo De, however, the helicopters were attacked. They returned to their base to refuel and were unable to return to the mission for several hours. Kerry recorded the situation in his notebook: "We therefore had a choice: to wait for what was not a confirmed return by the helos [and] give any snipers more time to set up an ambush for our exit or we could take a chance and exit immediately without any cover. We chose the latter." As the Swift boats reached the Cua Lon River, Kerry's boat was hit by a rocket-propelled grenade round, and a piece of shrapnel hit Kerry's left leg. Thereafter, they had no more trouble, and reached the Gulf of Thailand safely. Kerry still has shrapnel in his left thigh because the doctors tending to him decided to remove the damaged tissue and close the wound with sutures rather than make a wide opening to remove the shrapnel. Kerry received his second Purple Heart for this injury, but he did not take any time off from duty. Silver Star Only eight days later, on February 28, came the incident for which Kerry was awarded the Silver Star. On this occasion, Kerry was in tactical command of his Swift boat and two others. Their mission included bringing a demolition team and dozens of South Vietnamese soldiers to destroy enemy sampans, structures and bunkers. Along the Bay Hap River, they ran into an ambush. Kerry directed the boats "to turn to the beach and charge the Viet Cong positions" and he "expertly directed" his boat's fire and coordinated the deployment of the South Vietnamese troops, according to Admiral Zumwalt's original medal citation. After the South Vietnamese troops and an accompanying team of three U.S. Army advisors had disembarked at the ambush site, Kerry's boat and another headed up river to look for the fleeing enemy. The two boats came under fire from a Viet Cong B-40 rocket-propelled grenade, shattering the crew cabin windows of PCF-94. Kerry ordered the boats to turn and charge the second ambush site. As they reached the shore, a Viet Cong soldier jumped out of the brush, carrying a loaded B-40 launcher. With the enemy