An American auction house is selling artefacts from the failed Apollo 13 mission to the Moon in 1970. This includes the checklist which helped the crew return to Earth after an oxygen tank exploded on board. Here's Jane Peel.

"OK, Houston, we've had a problem here."

"This is Houston. Say again, please."

"Houston, we've had a problem."

"Houston, we've had a problem" was the mother of all understatements. An explosion on board the spacecraft two days into Nasa's third mission to the Moon left the three astronauts in grave danger. Commander Jim Lovell had just 15 minutes to make a series of critical mathematical calculations before a loss of power threatened to strand them in space. It is Commander Lovell's checklist that's being

auctioned

in Dallas next week.

BBC News

第二页：中英双语听力稿

The Yemeni President Ali Abdullah Saleh has signed a deal to transfer power to his vice-president, ending his rule of more than 30 years. The agreement followed nine months of protests in Yemen. Frank Gardner reports.

也门总统阿里·阿卜杜拉·萨利赫签署一项协议，准备将权力交至副总统，结束为期30多年的统治。协议签署之前，也门已经发生了9个月的抗议，Frank Gardner报道。

Three times Yemen's president has agreed to step down; three times he's gone back on his word. But today in the capital city of his powerful neighbour Saudi Arabia, President Ali Abdullah Saleh finally signed an agreement to transfer power, ending his 33-year rule. Saleh's opponents are saying he's the latest dictator to be toppled by this year's Arab uprising. But even if this time the president does stick to his word and leave office, this will not be the end of Yemen's troubles.