Industrial ETFs such as the Industrial Select Sector SPDR ( XLI) will provide investors to companies such as Caterpillar ( CAT), which will take part in the rebuilding process. Steel and timber will be other closely watched market sectors to keep an eye on as well. Investors can gain access to these industries through products such as the Market Vectors Steel ETF ( SLX) and the Guggenheim Timber ETF ( CUT) respectively. Japan has and will continue to generate headlines in the weeks ahead as the nation lays out a plan for recovery and takes initial action. Although the recent tragedy has stoked fears, as Buffett pointed out this week, it may also present a buying opportunity for brave investors. There are a number of options to consider when seeking out the companies that will be in the spotlight as the nation works to recover. Using ETFs, it is possible to target them in a safe, well-diversified manner. Written by Don Dion in Williamstown, Mass.