April 27, 2009-- Install two new cameras first, then repair the other two. That's what NASA has in mind for the planned Hubble repair flight featuring Space Shuttle Atlantis week after next. The blastoff, targeted for May 11, will include the installation of the Wide Field Camera-3 and the Cosmic Origins Spectrograph. Later in the flight, spacewalkers will tear into the guts of two other cameras (the Advanced Camera for Surveys and the Space Telescope Imaging Spectrograph) and try to re-wire them. Both of these older units failed last year. Saving the repairs for last is meant to give flight controllers the most "wiggle room" if problems crop up.