The second plane flies into the south tower.

第二架飞机撞上了世贸中心南塔。

youdao

Soon after he quietly took his post at the South Tower.

不久之后，他就开始默默地在南塔站岗。

youdao

A few minutes later, the second plane hit the south tower.

几分钟之后，第二架飞机撞上南塔。

youdao

He somehow sent the note out an opening in the South Tower and down to the street below.

CNN: Note lets family know 9/11 victim went down fighting

Marwan al-Shehhi is thought to have piloted United Air Lines Flight 175 into the World Trade Center's south tower.

CNN: Uncle calls hijack suspect 'innocent passenger'

From my office on the 17th floor I could see the South Tower and, beyond it, New Jersey, where I lived.

FORBES: 9/11 Stories: 'No One Talks About That'