Johanna Powell from Cardiff is feared to have drowned in the rogue river . news reporting for BBC news was on ' trip of a kind ' to Laos with friends . Cruise boat hit a rock in a stretch of river and sank within minutes . Huge search launched over 20 km of river to try and rescue another woman .
Johanna Powell from Cardiff is feared to have drowned in the Mekong river . Picture editor for BBC Wales was on 'trip of a lifetime ' to Laos with friends . Cruise boat hit a rock in a stretch of rapids and sank within minutes . Huge search launched over 20km of river to try and find missing woman .