"Although" with 尽管 (jǐnguǎn)

尽管 (jǐnguǎn) means "although", and is a little stronger than 虽然, perhaps more like "even though". The structure is 尽管 A，还是/仍然 B. For example, 

• 尽管已经到了下班的时间，他还是坚持工作。Even though it is already the time to get off work, he is still working. 
• 尽管他每天工作很紧张，可他的生活仍然很有规律。Even though he has a very busy schedule working every day, he still leads his life in routine. （note that 可 or 却 can be added before 还是 or 仍然 to further emphasize the shift in meaning in the second phrase.)

Please say the following sentences in Chinese:

1. Even though the building is burning, and very dangerous, the firefighters are still bravely running in to fight it.
2. Even though he's failed many times, he still wants to start a business.