Iman tweets for the first time after hubby David Bowir's passing..

David Bowie's widow Iman has broken her silence on social media for the first time since his death.
The 60-year-old former supermodel posted a simple message on her official Twitter page several hours ago that read: 'Love & gratitude'.
The poignant message has already been re-tweeted nearly 400 times and liked over 1,000.