During the breaststroke underwater pullout, the arms pull DOWN during the power phase, and then arms recover back UP to start the first stroke.

蛙泳水下蹬壁滑行时，手臂在蹬壁出发后要向下拨水，然后手臂恢复开始第一次蛙泳手划水。

youdao

When asked whether troops might be sent back if Iraq becomes unstable after the pullout, a senior aide said the president has always said he wanted some flexibility on the issue.

CNN: Obama: U.S. to withdraw most Iraq troops by August 2010